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class="vector-menu mw-portlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="//donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&utm_medium=sidebar&utm_campaign=C13_no.wikipedia.org&uselang=nb" class=""><span>Doner</span></a> </li> <li id="pt-createaccount-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Spesial:Opprett_konto&returnto=Luftfuktighet" title="Du oppfordres til å opprette en konto og logge inn, men det er ikke obligatorisk" class=""><span>Opprett konto</span></a> </li> <li id="pt-login-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Spesial:Logg_inn&returnto=Luftfuktighet" title="Du oppfordres til å logge inn, men det er ikke 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data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Innhold</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">flytt til sidefeltet</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">skjul</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">(Til toppen)</div> </a> </li> <li id="toc-Absolutt_luftfuktighet" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Absolutt_luftfuktighet"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Absolutt luftfuktighet</span> </div> </a> <ul id="toc-Absolutt_luftfuktighet-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Relativ_luftfuktighet" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Relativ_luftfuktighet"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Relativ luftfuktighet</span> </div> </a> <ul id="toc-Relativ_luftfuktighet-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Spesifikk_luftfuktighet" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Spesifikk_luftfuktighet"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Spesifikk luftfuktighet</span> </div> </a> <ul id="toc-Spesifikk_luftfuktighet-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Duggpunktstemperatur" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Duggpunktstemperatur"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Duggpunktstemperatur</span> </div> </a> <ul id="toc-Duggpunktstemperatur-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Målemetode" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Målemetode"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Målemetode</span> </div> </a> <ul id="toc-Målemetode-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Fuktighet_og_lufttetthet" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Fuktighet_og_lufttetthet"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Fuktighet og lufttetthet</span> </div> </a> <ul id="toc-Fuktighet_og_lufttetthet-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Effekt_på_kroppen" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Effekt_på_kroppen"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>Effekt på kroppen</span> </div> </a> <ul id="toc-Effekt_på_kroppen-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Se_også" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Se_også"> <div class="vector-toc-text"> <span class="vector-toc-numb">8</span> <span>Se også</span> </div> </a> <ul id="toc-Se_også-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Referanser" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Referanser"> <div class="vector-toc-text"> <span class="vector-toc-numb">9</span> <span>Referanser</span> </div> </a> <ul id="toc-Referanser-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Litteratur" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Litteratur"> <div class="vector-toc-text"> <span class="vector-toc-numb">10</span> <span>Litteratur</span> </div> </a> <ul id="toc-Litteratur-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Eksterne_lenker" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Eksterne_lenker"> <div class="vector-toc-text"> <span class="vector-toc-numb">11</span> <span>Eksterne lenker</span> </div> </a> <ul id="toc-Eksterne_lenker-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Innhold" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Vis/skjul innholdsfortegnelsen" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Vis/skjul innholdsfortegnelsen</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Luftfuktighet</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Gå til en artikkel på et annet språk. Tilgjengelig på 93 språk" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-93" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">93 språk</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Fukt" title="Fukt – norsk nynorsk" lang="nn" hreflang="nn" data-title="Fukt" data-language-autonym="Norsk nynorsk" data-language-local-name="norsk nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Luftfugtighed" title="Luftfugtighed – dansk" lang="da" hreflang="da" data-title="Luftfugtighed" data-language-autonym="Dansk" data-language-local-name="dansk" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Luftfuktighet" title="Luftfuktighet – svensk" lang="sv" hreflang="sv" data-title="Luftfuktighet" data-language-autonym="Svenska" data-language-local-name="svensk" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-af mw-list-item"><a href="https://af.wikipedia.org/wiki/Humiditeit" title="Humiditeit – afrikaans" lang="af" hreflang="af" data-title="Humiditeit" data-language-autonym="Afrikaans" data-language-local-name="afrikaans" class="interlanguage-link-target"><span>Afrikaans</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%B1%D8%B7%D9%88%D8%A8%D8%A9_%D8%A7%D9%84%D9%87%D9%88%D8%A7%D8%A1" title="رطوبة الهواء – arabisk" lang="ar" hreflang="ar" data-title="رطوبة الهواء" data-language-autonym="العربية" data-language-local-name="arabisk" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-as mw-list-item"><a href="https://as.wikipedia.org/wiki/%E0%A6%86%E0%A7%B0%E0%A7%8D%E0%A6%A6%E0%A7%8D%E0%A7%B0%E0%A6%A4%E0%A6%BE" title="আৰ্দ্ৰতা – assamesisk" lang="as" hreflang="as" data-title="আৰ্দ্ৰতা" data-language-autonym="অসমীয়া" data-language-local-name="assamesisk" class="interlanguage-link-target"><span>অসমীয়া</span></a></li><li class="interlanguage-link interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/Humed%C3%A1" title="Humedá – asturisk" lang="ast" hreflang="ast" data-title="Humedá" data-language-autonym="Asturianu" data-language-local-name="asturisk" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-gn mw-list-item"><a href="https://gn.wikipedia.org/wiki/Te%27%C3%B5" title="Te'õ – guarani" lang="gn" hreflang="gn" data-title="Te'õ" data-language-autonym="Avañe'ẽ" data-language-local-name="guarani" class="interlanguage-link-target"><span>Avañe'ẽ</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/R%C3%BCtub%C9%99t" title="Rütubət – aserbajdsjansk" lang="az" hreflang="az" data-title="Rütubət" data-language-autonym="Azərbaycanca" data-language-local-name="aserbajdsjansk" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%86%E0%A6%B0%E0%A7%8D%E0%A6%A6%E0%A7%8D%E0%A6%B0%E0%A6%A4%E0%A6%BE" title="আর্দ্রতা – bengali" lang="bn" hreflang="bn" data-title="আর্দ্রতা" data-language-autonym="বাংলা" data-language-local-name="bengali" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-zh-min-nan mw-list-item"><a href="https://zh-min-nan.wikipedia.org/wiki/Sip-t%C5%8D%CD%98" title="Sip-tō͘ – minnan" lang="nan" hreflang="nan" data-title="Sip-tō͘" data-language-autonym="閩南語 / Bân-lâm-gú" data-language-local-name="minnan" class="interlanguage-link-target"><span>閩南語 / Bân-lâm-gú</span></a></li><li class="interlanguage-link interwiki-ba mw-list-item"><a href="https://ba.wikipedia.org/wiki/%D0%94%D1%8B%D0%BC%D0%BB%D1%8B%D0%BB%D1%8B%D2%A1" title="Дымлылыҡ – basjkirsk" lang="ba" hreflang="ba" data-title="Дымлылыҡ" data-language-autonym="Башҡортса" data-language-local-name="basjkirsk" class="interlanguage-link-target"><span>Башҡортса</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%92%D1%96%D0%BB%D1%8C%D0%B3%D0%BE%D1%82%D0%BD%D0%B0%D1%81%D1%86%D1%8C_%D0%BF%D0%B0%D0%B2%D0%B5%D1%82%D1%80%D0%B0" title="Вільготнасць паветра – belarusisk" lang="be" hreflang="be" data-title="Вільготнасць паветра" data-language-autonym="Беларуская" data-language-local-name="belarusisk" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-be-x-old mw-list-item"><a href="https://be-tarask.wikipedia.org/wiki/%D0%92%D1%96%D0%BB%D1%8C%D0%B3%D0%BE%D1%82%D0%BD%D0%B0%D1%81%D1%8C%D1%86%D1%8C_%D0%BF%D0%B0%D0%B2%D0%B5%D1%82%D1%80%D0%B0" title="Вільготнасьць паветра – belarusisk (klassisk ortografi)" lang="be-tarask" hreflang="be-tarask" data-title="Вільготнасьць паветра" data-language-autonym="Беларуская (тарашкевіца)" data-language-local-name="belarusisk (klassisk ortografi)" class="interlanguage-link-target"><span>Беларуская (тарашкевіца)</span></a></li><li class="interlanguage-link interwiki-bh mw-list-item"><a href="https://bh.wikipedia.org/wiki/%E0%A4%A8%E0%A4%AE%E0%A5%80" title="नमी – bihari" lang="bh" hreflang="bh" data-title="नमी" data-language-autonym="भोजपुरी" data-language-local-name="bihari" class="interlanguage-link-target"><span>भोजपुरी</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%92%D0%BB%D0%B0%D0%B6%D0%BD%D0%BE%D1%81%D1%82_%D0%BD%D0%B0_%D0%B2%D1%8A%D0%B7%D0%B4%D1%83%D1%85%D0%B0" title="Влажност на въздуха – bulgarsk" lang="bg" hreflang="bg" data-title="Влажност на въздуха" data-language-autonym="Български" data-language-local-name="bulgarsk" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bar mw-list-item"><a href="https://bar.wikipedia.org/wiki/Luaftfeichtigkeit" title="Luaftfeichtigkeit – bairisk" lang="bar" hreflang="bar" data-title="Luaftfeichtigkeit" data-language-autonym="Boarisch" data-language-local-name="bairisk" class="interlanguage-link-target"><span>Boarisch</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Vla%C5%BEnost" title="Vlažnost – bosnisk" lang="bs" hreflang="bs" data-title="Vlažnost" data-language-autonym="Bosanski" data-language-local-name="bosnisk" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Humitat" title="Humitat – katalansk" lang="ca" hreflang="ca" data-title="Humitat" data-language-autonym="Català" data-language-local-name="katalansk" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cv mw-list-item"><a href="https://cv.wikipedia.org/wiki/%D0%9D%D3%B3%D1%80%D0%BB%C4%95%D1%85" title="Нӳрлĕх – tsjuvasjisk" lang="cv" hreflang="cv" data-title="Нӳрлĕх" data-language-autonym="Чӑвашла" data-language-local-name="tsjuvasjisk" class="interlanguage-link-target"><span>Чӑвашла</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Vlhkost_vzduchu" title="Vlhkost vzduchu – tsjekkisk" lang="cs" hreflang="cs" data-title="Vlhkost vzduchu" data-language-autonym="Čeština" data-language-local-name="tsjekkisk" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-sn mw-list-item"><a href="https://sn.wikipedia.org/wiki/Munyonhi" title="Munyonhi – shona" lang="sn" hreflang="sn" data-title="Munyonhi" data-language-autonym="ChiShona" data-language-local-name="shona" class="interlanguage-link-target"><span>ChiShona</span></a></li><li class="interlanguage-link interwiki-cy mw-list-item"><a href="https://cy.wikipedia.org/wiki/Lleithder" title="Lleithder – walisisk" lang="cy" hreflang="cy" data-title="Lleithder" data-language-autonym="Cymraeg" data-language-local-name="walisisk" class="interlanguage-link-target"><span>Cymraeg</span></a></li><li class="interlanguage-link interwiki-de badge-Q17437796 badge-featuredarticle mw-list-item" title="utmerket artikkel-merke"><a href="https://de.wikipedia.org/wiki/Luftfeuchtigkeit" title="Luftfeuchtigkeit – tysk" lang="de" hreflang="de" data-title="Luftfeuchtigkeit" data-language-autonym="Deutsch" data-language-local-name="tysk" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/%C3%95huniiskus" title="Õhuniiskus – estisk" lang="et" hreflang="et" data-title="Õhuniiskus" data-language-autonym="Eesti" data-language-local-name="estisk" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%A5%CE%B3%CF%81%CE%B1%CF%83%CE%AF%CE%B1_%CE%B1%CF%84%CE%BC%CF%8C%CF%83%CF%86%CE%B1%CE%B9%CF%81%CE%B1%CF%82" title="Υγρασία ατμόσφαιρας – gresk" lang="el" hreflang="el" data-title="Υγρασία ατμόσφαιρας" data-language-autonym="Ελληνικά" data-language-local-name="gresk" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Humidity" title="Humidity – engelsk" lang="en" hreflang="en" data-title="Humidity" data-language-autonym="English" data-language-local-name="engelsk" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Humedad_del_aire" title="Humedad del aire – spansk" lang="es" hreflang="es" data-title="Humedad del aire" data-language-autonym="Español" data-language-local-name="spansk" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Humideco" title="Humideco – esperanto" lang="eo" hreflang="eo" data-title="Humideco" data-language-autonym="Esperanto" data-language-local-name="esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Hezetasun" title="Hezetasun – baskisk" lang="eu" hreflang="eu" data-title="Hezetasun" data-language-autonym="Euskara" data-language-local-name="baskisk" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%B1%D8%B7%D9%88%D8%A8%D8%AA" title="رطوبت – persisk" lang="fa" hreflang="fa" data-title="رطوبت" data-language-autonym="فارسی" data-language-local-name="persisk" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Hygrom%C3%A9trie" title="Hygrométrie – fransk" lang="fr" hreflang="fr" data-title="Hygrométrie" data-language-autonym="Français" data-language-local-name="fransk" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/Bogthaise" title="Bogthaise – irsk" lang="ga" hreflang="ga" data-title="Bogthaise" data-language-autonym="Gaeilge" data-language-local-name="irsk" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-gd mw-list-item"><a href="https://gd.wikipedia.org/wiki/Taisead" title="Taisead – skotsk-gælisk" lang="gd" hreflang="gd" data-title="Taisead" data-language-autonym="Gàidhlig" data-language-local-name="skotsk-gælisk" class="interlanguage-link-target"><span>Gàidhlig</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Humidade" title="Humidade – galisisk" lang="gl" hreflang="gl" data-title="Humidade" data-language-autonym="Galego" data-language-local-name="galisisk" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%8A%B5%EB%8F%84" title="습도 – koreansk" lang="ko" hreflang="ko" data-title="습도" data-language-autonym="한국어" data-language-local-name="koreansk" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-ha mw-list-item"><a href="https://ha.wikipedia.org/wiki/Danshi" title="Danshi – hausa" lang="ha" hreflang="ha" data-title="Danshi" data-language-autonym="Hausa" data-language-local-name="hausa" class="interlanguage-link-target"><span>Hausa</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D4%BD%D5%B8%D5%B6%D5%A1%D5%BE%D5%B8%D6%82%D5%A9%D5%B5%D5%B8%D6%82%D5%B6" title="Խոնավություն – armensk" lang="hy" hreflang="hy" data-title="Խոնավություն" data-language-autonym="Հայերեն" data-language-local-name="armensk" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%86%E0%A4%B0%E0%A5%8D%E0%A4%A6%E0%A5%8D%E0%A4%B0%E0%A4%A4%E0%A4%BE" title="आर्द्रता – hindi" lang="hi" hreflang="hi" data-title="आर्द्रता" data-language-autonym="हिन्दी" data-language-local-name="hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Vla%C5%BEnost_zraka" title="Vlažnost zraka – kroatisk" lang="hr" hreflang="hr" data-title="Vlažnost zraka" data-language-autonym="Hrvatski" data-language-local-name="kroatisk" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-ilo mw-list-item"><a href="https://ilo.wikipedia.org/wiki/Dam-eg" title="Dam-eg – iloko" lang="ilo" hreflang="ilo" data-title="Dam-eg" data-language-autonym="Ilokano" data-language-local-name="iloko" class="interlanguage-link-target"><span>Ilokano</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Kelembapan" title="Kelembapan – indonesisk" lang="id" hreflang="id" data-title="Kelembapan" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonesisk" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Umidit%C3%A0" title="Umidità – italiensk" lang="it" hreflang="it" data-title="Umidità" data-language-autonym="Italiano" data-language-local-name="italiensk" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%9C%D7%97%D7%95%D7%AA" title="לחות – hebraisk" lang="he" hreflang="he" data-title="לחות" data-language-autonym="עברית" data-language-local-name="hebraisk" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-kn mw-list-item"><a href="https://kn.wikipedia.org/wiki/%E0%B2%86%E0%B2%B0%E0%B3%8D%E0%B2%A6%E0%B3%8D%E0%B2%B0%E0%B2%A4%E0%B3%86" title="ಆರ್ದ್ರತೆ – kannada" lang="kn" hreflang="kn" data-title="ಆರ್ದ್ರತೆ" data-language-autonym="ಕನ್ನಡ" data-language-local-name="kannada" class="interlanguage-link-target"><span>ಕನ್ನಡ</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%A2%E1%83%94%E1%83%9C%E1%83%98%E1%83%90%E1%83%9C%E1%83%9D%E1%83%91%E1%83%90" title="ტენიანობა – georgisk" lang="ka" hreflang="ka" data-title="ტენიანობა" data-language-autonym="ქართული" data-language-local-name="georgisk" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%AB%D0%BB%D2%93%D0%B0%D0%BB%D0%B4%D1%8B%D0%BB%D1%8B%D2%9B" title="Ылғалдылық – kasakhisk" lang="kk" hreflang="kk" data-title="Ылғалдылық" data-language-autonym="Қазақша" data-language-local-name="kasakhisk" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-sw mw-list-item"><a href="https://sw.wikipedia.org/wiki/Unyevuanga" title="Unyevuanga – swahili" lang="sw" hreflang="sw" data-title="Unyevuanga" data-language-autonym="Kiswahili" data-language-local-name="swahili" class="interlanguage-link-target"><span>Kiswahili</span></a></li><li class="interlanguage-link interwiki-ku mw-list-item"><a href="https://ku.wikipedia.org/wiki/Nem" title="Nem – kurdisk" lang="ku" hreflang="ku" data-title="Nem" data-language-autonym="Kurdî" data-language-local-name="kurdisk" class="interlanguage-link-target"><span>Kurdî</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Gaisa_mitrums" title="Gaisa mitrums – latvisk" lang="lv" hreflang="lv" data-title="Gaisa mitrums" data-language-autonym="Latviešu" data-language-local-name="latvisk" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Atmosferos_dr%C4%97gm%C4%97" title="Atmosferos drėgmė – litauisk" lang="lt" hreflang="lt" data-title="Atmosferos drėgmė" data-language-autonym="Lietuvių" data-language-local-name="litauisk" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-lmo mw-list-item"><a href="https://lmo.wikipedia.org/wiki/Umidit%C3%A0" title="Umidità – lombardisk" lang="lmo" hreflang="lmo" data-title="Umidità" data-language-autonym="Lombard" data-language-local-name="lombardisk" class="interlanguage-link-target"><span>Lombard</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%92%D0%BB%D0%B0%D0%B6%D0%BD%D0%BE%D1%81%D1%82" title="Влажност – makedonsk" lang="mk" hreflang="mk" data-title="Влажност" data-language-autonym="Македонски" data-language-local-name="makedonsk" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%86%E0%B5%BC%E0%B4%A6%E0%B5%8D%E0%B4%B0%E0%B4%A4" title="ആർദ്രത – malayalam" lang="ml" hreflang="ml" data-title="ആർദ്രത" data-language-autonym="മലയാളം" data-language-local-name="malayalam" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-mr mw-list-item"><a href="https://mr.wikipedia.org/wiki/%E0%A4%86%E0%A4%B0%E0%A5%8D%E0%A4%A6%E0%A5%8D%E0%A4%B0%E0%A4%A4%E0%A4%BE" title="आर्द्रता – marathi" lang="mr" hreflang="mr" data-title="आर्द्रता" data-language-autonym="मराठी" data-language-local-name="marathi" class="interlanguage-link-target"><span>मराठी</span></a></li><li class="interlanguage-link interwiki-xmf mw-list-item"><a href="https://xmf.wikipedia.org/wiki/%E1%83%A1%E1%83%98%E1%83%9A%E1%83%90%E1%83%9B%E1%83%94" title="სილამე – mingrelsk" lang="xmf" hreflang="xmf" data-title="სილამე" data-language-autonym="მარგალური" data-language-local-name="mingrelsk" class="interlanguage-link-target"><span>მარგალური</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Kelembapan" title="Kelembapan – malayisk" lang="ms" hreflang="ms" data-title="Kelembapan" data-language-autonym="Bahasa Melayu" data-language-local-name="malayisk" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-mn mw-list-item"><a href="https://mn.wikipedia.org/wiki/%D0%90%D0%B3%D0%B0%D0%B0%D1%80%D1%8B%D0%BD_%D1%87%D0%B8%D0%B9%D0%B3%D1%88%D0%B8%D0%BB" title="Агаарын чийгшил – mongolsk" lang="mn" hreflang="mn" data-title="Агаарын чийгшил" data-language-autonym="Монгол" data-language-local-name="mongolsk" class="interlanguage-link-target"><span>Монгол</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Luchtvochtigheid" title="Luchtvochtigheid – nederlandsk" lang="nl" hreflang="nl" data-title="Luchtvochtigheid" data-language-autonym="Nederlands" data-language-local-name="nederlandsk" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-ne mw-list-item"><a href="https://ne.wikipedia.org/wiki/%E0%A4%86%E0%A4%A6%E0%A5%8D%E0%A4%B0%E0%A4%A4%E0%A4%BE" title="आद्रता – nepali" lang="ne" hreflang="ne" data-title="आद्रता" data-language-autonym="नेपाली" data-language-local-name="nepali" class="interlanguage-link-target"><span>नेपाली</span></a></li><li class="interlanguage-link interwiki-new mw-list-item"><a href="https://new.wikipedia.org/wiki/%E0%A4%86%E0%A4%B0%E0%A5%8D%E0%A4%A6%E0%A5%8D%E0%A4%B0%E0%A4%A4%E0%A4%BE" title="आर्द्रता – newari" lang="new" hreflang="new" data-title="आर्द्रता" data-language-autonym="नेपाल भाषा" data-language-local-name="newari" class="interlanguage-link-target"><span>नेपाल भाषा</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E6%B9%BF%E5%BA%A6" title="湿度 – japansk" lang="ja" hreflang="ja" data-title="湿度" data-language-autonym="日本語" data-language-local-name="japansk" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-nap mw-list-item"><a href="https://nap.wikipedia.org/wiki/Ummedet%C3%A0" title="Ummedetà – napolitansk" lang="nap" hreflang="nap" data-title="Ummedetà" data-language-autonym="Napulitano" data-language-local-name="napolitansk" class="interlanguage-link-target"><span>Napulitano</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Namlik" title="Namlik – usbekisk" lang="uz" hreflang="uz" data-title="Namlik" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="usbekisk" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-pa mw-list-item"><a href="https://pa.wikipedia.org/wiki/%E0%A8%A8%E0%A8%AE%E0%A9%80" title="ਨਮੀ – panjabi" lang="pa" hreflang="pa" data-title="ਨਮੀ" data-language-autonym="ਪੰਜਾਬੀ" data-language-local-name="panjabi" class="interlanguage-link-target"><span>ਪੰਜਾਬੀ</span></a></li><li class="interlanguage-link interwiki-pms mw-list-item"><a href="https://pms.wikipedia.org/wiki/Umidit%C3%A0" title="Umidità – piemontesisk" lang="pms" hreflang="pms" data-title="Umidità" data-language-autonym="Piemontèis" data-language-local-name="piemontesisk" class="interlanguage-link-target"><span>Piemontèis</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Wilgotno%C5%9B%C4%87_powietrza" title="Wilgotność powietrza – polsk" lang="pl" hreflang="pl" data-title="Wilgotność powietrza" data-language-autonym="Polski" data-language-local-name="polsk" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Humidade" title="Humidade – portugisisk" lang="pt" hreflang="pt" data-title="Humidade" data-language-autonym="Português" data-language-local-name="portugisisk" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Umiditate" title="Umiditate – rumensk" lang="ro" hreflang="ro" data-title="Umiditate" data-language-autonym="Română" data-language-local-name="rumensk" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%92%D0%BB%D0%B0%D0%B6%D0%BD%D0%BE%D1%81%D1%82%D1%8C" title="Влажность – russisk" lang="ru" hreflang="ru" data-title="Влажность" data-language-autonym="Русский" data-language-local-name="russisk" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sc mw-list-item"><a href="https://sc.wikipedia.org/wiki/Umidade" title="Umidade – sardisk" lang="sc" hreflang="sc" data-title="Umidade" data-language-autonym="Sardu" data-language-local-name="sardisk" class="interlanguage-link-target"><span>Sardu</span></a></li><li class="interlanguage-link interwiki-sq mw-list-item"><a href="https://sq.wikipedia.org/wiki/Lag%C3%ABshtia" title="Lagështia – albansk" lang="sq" hreflang="sq" data-title="Lagështia" data-language-autonym="Shqip" data-language-local-name="albansk" class="interlanguage-link-target"><span>Shqip</span></a></li><li class="interlanguage-link interwiki-scn mw-list-item"><a href="https://scn.wikipedia.org/wiki/Umiditati" title="Umiditati – siciliansk" lang="scn" hreflang="scn" data-title="Umiditati" data-language-autonym="Sicilianu" data-language-local-name="siciliansk" class="interlanguage-link-target"><span>Sicilianu</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Humidity" title="Humidity – enkel engelsk" lang="en-simple" hreflang="en-simple" data-title="Humidity" data-language-autonym="Simple English" data-language-local-name="enkel engelsk" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Vlhkos%C5%A5_vzduchu" title="Vlhkosť vzduchu – slovakisk" lang="sk" hreflang="sk" data-title="Vlhkosť vzduchu" data-language-autonym="Slovenčina" data-language-local-name="slovakisk" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Vla%C5%BEnost" title="Vlažnost – slovensk" lang="sl" hreflang="sl" data-title="Vlažnost" data-language-autonym="Slovenščina" data-language-local-name="slovensk" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-so mw-list-item"><a href="https://so.wikipedia.org/wiki/Dhado" title="Dhado – somali" lang="so" hreflang="so" data-title="Dhado" data-language-autonym="Soomaaliga" data-language-local-name="somali" class="interlanguage-link-target"><span>Soomaaliga</span></a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wikipedia.org/wiki/%D8%B4%DB%8E" title="شێ – sentralkurdisk" lang="ckb" hreflang="ckb" data-title="شێ" data-language-autonym="کوردی" data-language-local-name="sentralkurdisk" class="interlanguage-link-target"><span>کوردی</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%92%D0%BB%D0%B0%D0%B6%D0%BD%D0%BE%D1%81%D1%82" title="Влажност – serbisk" lang="sr" hreflang="sr" data-title="Влажност" data-language-autonym="Српски / srpski" data-language-local-name="serbisk" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Vla%C5%BEnost_zraka" title="Vlažnost zraka – serbokroatisk" lang="sh" hreflang="sh" data-title="Vlažnost zraka" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="serbokroatisk" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Ilman_kosteus" title="Ilman kosteus – finsk" lang="fi" hreflang="fi" data-title="Ilman kosteus" data-language-autonym="Suomi" data-language-local-name="finsk" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-tl mw-list-item"><a href="https://tl.wikipedia.org/wiki/Halumigmig" title="Halumigmig – tagalog" lang="tl" hreflang="tl" data-title="Halumigmig" data-language-autonym="Tagalog" data-language-local-name="tagalog" class="interlanguage-link-target"><span>Tagalog</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%88%E0%AE%B0%E0%AE%AA%E0%AF%8D%E0%AE%AA%E0%AE%A4%E0%AE%AE%E0%AF%8D" title="ஈரப்பதம் – tamil" lang="ta" hreflang="ta" data-title="ஈரப்பதம்" data-language-autonym="தமிழ்" data-language-local-name="tamil" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-te mw-list-item"><a href="https://te.wikipedia.org/wiki/%E0%B0%86%E0%B0%B0%E0%B1%8D%E0%B0%A6%E0%B1%8D%E0%B0%B0%E0%B0%A4" title="ఆర్ద్రత – telugu" lang="te" hreflang="te" data-title="ఆర్ద్రత" data-language-autonym="తెలుగు" data-language-local-name="telugu" class="interlanguage-link-target"><span>తెలుగు</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B8%84%E0%B8%A7%E0%B8%B2%E0%B8%A1%E0%B8%8A%E0%B8%B7%E0%B9%89%E0%B8%99" title="ความชื้น – thai" lang="th" hreflang="th" data-title="ความชื้น" data-language-autonym="ไทย" data-language-local-name="thai" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Nem" title="Nem – tyrkisk" lang="tr" hreflang="tr" data-title="Nem" data-language-autonym="Türkçe" data-language-local-name="tyrkisk" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%92%D0%BE%D0%BB%D0%BE%D0%B3%D1%96%D1%81%D1%82%D1%8C_%D0%BF%D0%BE%D0%B2%D1%96%D1%82%D1%80%D1%8F" title="Вологість повітря – ukrainsk" lang="uk" hreflang="uk" data-title="Вологість повітря" data-language-autonym="Українська" data-language-local-name="ukrainsk" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-ur mw-list-item"><a href="https://ur.wikipedia.org/wiki/%D9%86%D9%85%DB%8C" title="نمی – urdu" lang="ur" hreflang="ur" data-title="نمی" data-language-autonym="اردو" data-language-local-name="urdu" class="interlanguage-link-target"><span>اردو</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/%C4%90%E1%BB%99_%E1%BA%A9m_tuy%E1%BB%87t_%C4%91%E1%BB%91i" title="Độ ẩm tuyệt đối – vietnamesisk" lang="vi" hreflang="vi" data-title="Độ ẩm tuyệt đối" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamesisk" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/%E6%B9%BF%E5%BA%A6" title="湿度 – wu" lang="wuu" hreflang="wuu" data-title="湿度" data-language-autonym="吴语" data-language-local-name="wu" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-yi mw-list-item"><a href="https://yi.wikipedia.org/wiki/%D7%A4%D7%99%D7%99%D7%9B%D7%98%D7%A7%D7%99%D7%99%D7%98" title="פייכטקייט – jiddisk" lang="yi" hreflang="yi" data-title="פייכטקייט" data-language-autonym="ייִדיש" data-language-local-name="jiddisk" class="interlanguage-link-target"><span>ייִדיש</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E6%BF%95%E5%BA%A6" title="濕度 – kantonesisk" lang="yue" hreflang="yue" data-title="濕度" data-language-autonym="粵語" data-language-local-name="kantonesisk" class="interlanguage-link-target"><span>粵語</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E6%B9%BF%E5%BA%A6" title="湿度 – kinesisk" lang="zh" hreflang="zh" data-title="湿度" data-language-autonym="中文" data-language-local-name="kinesisk" class="interlanguage-link-target"><span>中文</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q180600#sitelinks-wikipedia" title="Rediger lenker til artikkelen på andre språk" class="wbc-editpage">Rediger lenker</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Navnerom"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Luftfuktighet" title="Vis 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class="vector-pinnable-header-label">Utseende</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">flytt til sidefeltet</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">skjul</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">Fra Wikipedia, den frie encyklopedi</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="nb" dir="ltr"><figure class="mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/Fil:Kondensierender_Wasserdampf01.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/4/45/Kondensierender_Wasserdampf01.jpg/200px-Kondensierender_Wasserdampf01.jpg" decoding="async" width="200" height="355" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/45/Kondensierender_Wasserdampf01.jpg/300px-Kondensierender_Wasserdampf01.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/45/Kondensierender_Wasserdampf01.jpg/400px-Kondensierender_Wasserdampf01.jpg 2x" data-file-width="500" data-file-height="888" /></a><figcaption>Kondensert vanndamp på et vindu viser at luften er fuktig.</figcaption></figure> <p><b>Luftfuktighet</b> er et mål på hvor mye <a href="/wiki/Vanndamp" title="Vanndamp">vanndamp</a> det er i <a href="/wiki/Luft" title="Luft">luften</a> og kan angis enten som absolutt luftfuktighet, <a href="/wiki/Relativ_luftfuktighet" class="mw-redirect" title="Relativ luftfuktighet">relativ luftfuktighet</a>, spesifikk luftfuktighet eller som forskjell mellom <a href="/wiki/Temperatur" title="Temperatur">temperatur</a> og <a href="/wiki/Duggpunktstemperatur" class="mw-redirect" title="Duggpunktstemperatur">duggpunktstemperatur</a>. Relativ fuktighet er den mest brukte måten innen <a href="/wiki/V%C3%A6rvarsling" title="Værvarsling">værvarsling</a>. Fuktighet spiller en viktig rolle i dannelse av <a href="/wiki/Nedb%C3%B8r" title="Nedbør">nedbør</a>, <a href="/wiki/Dugg" title="Dugg">dugg</a>, <a href="/wiki/T%C3%A5ke" title="Tåke">tåke</a> og <a href="/wiki/Ising" title="Ising">ising</a> som kan være alvorlig for <a href="/wiki/Fly" title="Fly">fly</a> og <a href="/wiki/Skip" title="Skip">skip</a>. Høy relativ fuktighet gjør at temperaturen kan føles høyere enn den er. Når det er mye fuktighet i luften vil dette redusere <a href="/wiki/Fordampning" title="Fordampning">fordampningsevnen</a> til <a href="/wiki/Svette" title="Svette">svette</a> på kroppen og avkjølingseffekten blir mindre. Luftfuktighet kan måles med et <a href="/wiki/Hygrometer" title="Hygrometer">hygrometer</a>. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Absolutt_luftfuktighet">Absolutt luftfuktighet</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Luftfuktighet&veaction=edit&section=1" title="Rediger avsnitt: Absolutt luftfuktighet" class="mw-editsection-visualeditor"><span>rediger</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Luftfuktighet&action=edit&section=1" title="Rediger kildekoden til seksjonen Absolutt luftfuktighet"><span>rediger kilde</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Absolutt luftfuktighet er et mål for hvor mye vanndamp det er innenfor et gitt volum og blir uttrykt som antall <a href="/wiki/Gram" title="Gram">gram</a> vanndamp per kubikkmeter luft.<sup id="cite_ref-Grøn_1-0" class="reference"><a href="#cite_note-Grøn-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> Denne størrelsen angis som <i>AH</i> (fra engelsk <i>Absolute Humidity</i>) eller ganske enkelt som <i>f<sub>v</sub> </i> for fuktighet fra vann. Matematisk kan man da skrive </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle f_{v}={m_{v} \over V}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msub> <mi>f</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>v</mi> </mrow> </msub> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <msub> <mi>m</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>v</mi> </mrow> </msub> <mi>V</mi> </mfrac> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle f_{v}={m_{v} \over V}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/710629b707201142bc00f1180b950a773f488083" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -2.005ex; width:9.173ex; height:4.843ex;" alt="{\displaystyle f_{v}={m_{v} \over V}}"></span></dd></dl> <p>der <i>m<sub>v</sub> </i> er massen av vanndamp i volumet <i>V</i> med fuktig luft. Med denne definisjonen er absolutt fuktighet ikke noe annet enn tettheten <i>ρ<sub>v</sub> </i> til vanndampen i luften. For eksempel ved 30 °C vil den kunne variere fra 0 til 30 g/m<sup>3</sup>. Ved den høyeste verdien som tilsvarer <a href="/wiki/Metningstrykk" class="mw-redirect" title="Metningstrykk">metningstrykket</a> for vanndamp, sier man at luften er «mettet» og man føler seg fuktig. Den absolutte fuktigheten betegnes da som <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle f_{*}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msub> <mi>f</mi> <mrow class="MJX-TeXAtom-ORD"> <mo>∗</mo> </mrow> </msub> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle f_{*}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/903e97c260c5d157bff320b5e38e0e4b42cd20ad" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; width:2.193ex; height:2.509ex;" alt="{\displaystyle f_{*}}"></span>. </p><p>Volumet til luften endrer seg i takt med <a href="/wiki/Lufttrykk" class="mw-redirect" title="Lufttrykk">lufttrykket</a>, og dermed vil absolutt luftfuktighet også endre seg med lufttrykket. Dette kan være tungvint for utregninger innen kjemiteknikk, og som følge av dette blir absolutt fukt innen kjemiteknikk definert som massen av vann i forhold til massen av tørr luft. Dette er også kjent som blandingsforholdet (se under). Massen av vann per volum blir da definert som volumetrisk fukt. </p> <div class="mw-heading mw-heading2"><h2 id="Relativ_luftfuktighet">Relativ luftfuktighet</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Luftfuktighet&veaction=edit&section=2" title="Rediger avsnitt: Relativ luftfuktighet" class="mw-editsection-visualeditor"><span>rediger</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Luftfuktighet&action=edit&section=2" title="Rediger kildekoden til seksjonen Relativ luftfuktighet"><span>rediger kilde</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><a href="/wiki/Relativ_luftfuktighet" class="mw-redirect" title="Relativ luftfuktighet">Relativ luftfuktighet</a> ved en bestemt temperatur er definert som forholdet mellom absolutt fuktighet og dens maksimale verdi ved denne temperaturen som tilsvarer metning. Dette mål for fuktighet tegnes som <i>RH</i> (fra engelsk <i>Relative Humidity</i>) eller mer vanlig med det greske bokstaven <i>φ</i>. Demed er </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \phi ={f_{v} \over f_{*}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>ϕ</mi> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <msub> <mi>f</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>v</mi> </mrow> </msub> <msub> <mi>f</mi> <mrow class="MJX-TeXAtom-ORD"> <mo>∗</mo> </mrow> </msub> </mfrac> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \phi ={f_{v} \over f_{*}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/720487745b6a995611863fb1cfec426a3b995b82" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -2.338ex; width:7.513ex; height:5.843ex;" alt="{\displaystyle \phi ={f_{v} \over f_{*}}}"></span></dd></dl> <p>og er en størrelse som kan variere mellom 0 og 1. Mest vanlig er det derfor å angi den i <a href="/wiki/Prosent" title="Prosent">prosent</a> %. </p><p><a href="/wiki/Vanndamp" title="Vanndamp">Vanndamp</a> kan med god tilnærmelse beskrives som en <a href="/wiki/Ideell_gass" title="Ideell gass">ideell gass</a>.<sup id="cite_ref-Müller_2-0" class="reference"><a href="#cite_note-Müller-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> Da er dens tetthet <i>ρ<sub>v</sub></i> = <i>f<sub>v</sub> </i> direkte proporsjonal med dens <a href="/wiki/Partialtrykk" title="Partialtrykk">partialtrykk</a> <i>p<sub>v</sub></i>. En ekvivalent definisjon av relativ fuktighet er derfor </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \phi ={p_{v} \over p_{*}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>ϕ</mi> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <msub> <mi>p</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>v</mi> </mrow> </msub> <msub> <mi>p</mi> <mrow class="MJX-TeXAtom-ORD"> <mo>∗</mo> </mrow> </msub> </mfrac> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \phi ={p_{v} \over p_{*}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/71c2a88214c6cca4bf834415a653b7107e464d52" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -2.338ex; width:7.544ex; height:5.343ex;" alt="{\displaystyle \phi ={p_{v} \over p_{*}}}"></span></dd></dl> <p>hvor <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle p_{*}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msub> <mi>p</mi> <mrow class="MJX-TeXAtom-ORD"> <mo>∗</mo> </mrow> </msub> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle p_{*}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/bd15afb0e1bde853d2b56e17137ac1b5550e7b91" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; margin-left: -0.089ex; width:2.313ex; height:2.009ex;" alt="{\displaystyle p_{*}}"></span> er <a href="/wiki/Metningstrykk" class="mw-redirect" title="Metningstrykk">metningstrykket</a> til vanndampen ved den gjeldende temperatur. Innen <a href="/wiki/Meteorologi" title="Meteorologi">meteorologien</a> er det vanlig å betegne disse vanndamptrykkene som <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle e}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>e</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle e}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/cd253103f0876afc68ebead27a5aa9867d927467" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.083ex; height:1.676ex;" alt="{\displaystyle e}"></span> og <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle e_{*}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msub> <mi>e</mi> <mrow class="MJX-TeXAtom-ORD"> <mo>∗</mo> </mrow> </msub> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle e_{*}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/60612dd1ae31bb685ef1153cb50fe3dee71f9977" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.293ex; margin-bottom: -0.379ex; width:2.138ex; height:2.009ex;" alt="{\displaystyle e_{*}}"></span> som eventuelt også kalles <i>E</i>. </p><p>Da metningstrykket øker raskt med økende temperatur, vil den relative fuktigheten avta når luft med en gitt absolutt fuktighet varmes opp. Derfor sies det noen ganger at varm luft kan holde mer fuktighet. Avkjøles luft, vil den relative fuktigheten øke. For å få <a href="/wiki/Sky" title="Sky">skyer</a> og <a href="/wiki/Regn" title="Regn">regn</a>, må luften nå 100 % relativ fuktighet, men bare der skyene blir dannet eller der regnet oppstår. Dette skjer vanligvis ved at luften blir hevet og så avkjølt. Vanligvis faller regnet ned i luft med mindre relativ fuktighet. Noe av vannet i regnet kan fordampe inn i luften mens det faller, og på den måten øke fuktigheten, men sjelden nok til at fuktigheten blir 100 %. Faktisk kan regn som faller mot bakken være kaldt nok til å kondensere vanndamp fra varm og fuktig luft, og på den måten minke den relative fukten. </p> <div class="mw-heading mw-heading2"><h2 id="Spesifikk_luftfuktighet">Spesifikk luftfuktighet</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Luftfuktighet&veaction=edit&section=3" title="Rediger avsnitt: Spesifikk luftfuktighet" class="mw-editsection-visualeditor"><span>rediger</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Luftfuktighet&action=edit&section=3" title="Rediger kildekoden til seksjonen Spesifikk luftfuktighet"><span>rediger kilde</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Spesifikk luftfuktighet <i>q</i>  angir hvor stor del massen til vanndampen utgjør av den totale massen til fuktig luft i et bestemt volum. Med fuktig luft menes her en blanding av vanndamp og tørr luft. Kalles massen til den tørre delen av luften for <i>m<sub>d</sub></i>, er den spesifikke luftfuktigheten derfor gitt som<sup id="cite_ref-Grøn_1-1" class="reference"><a href="#cite_note-Grøn-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle q={m_{v} \over m_{d}+m_{v}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>q</mi> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <msub> <mi>m</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>v</mi> </mrow> </msub> <mrow> <msub> <mi>m</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>d</mi> </mrow> </msub> <mo>+</mo> <msub> <mi>m</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>v</mi> </mrow> </msub> </mrow> </mfrac> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle q={m_{v} \over m_{d}+m_{v}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/f13e556d677833bc709a969ad4038ce0075a7ef0" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -2.171ex; width:14.047ex; height:5.009ex;" alt="{\displaystyle q={m_{v} \over m_{d}+m_{v}}}"></span></dd></dl> <p>Dette kan skrives som </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle q={x \over 1+x}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>q</mi> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mi>x</mi> <mrow> <mn>1</mn> <mo>+</mo> <mi>x</mi> </mrow> </mfrac> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle q={x \over 1+x}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/dc32f00a7631a67084b5befde886fe389124ad88" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -2.005ex; width:10.337ex; height:4.843ex;" alt="{\displaystyle q={x \over 1+x}}"></span></dd></dl> <p>når man innfører <b>blandingsforholdet</b> <i>x = m<sub>v</sub>/m<sub>d</sub></i>. Når dette er lite, angir det derfor også den spesifikke fuktigheten.<sup id="cite_ref-Müller_2-1" class="reference"><a href="#cite_note-Müller-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p><p>I de fleste praktiske situasjoner kan man beskrive både vanndampen og den <a href="/wiki/Luft" title="Luft">tørre luften</a> som ideelle gasser med <a href="/wiki/Molar_masse" title="Molar masse">molare masser</a> på henholdsvis <span class="nowrap"><i>M<sub>v</sub></i> = 18.0 g/mol</span> og <span class="nowrap"><i>M<sub>d</sub></i> = 28.8 g/mol.</span> Partialtrykket til den komponenten av luften som har molar masse <i>M<sub>i</sub></i>, kan da uttrykkes ved tettheten som <i>p<sub>i</sub> = ρ<sub>i</sub>RT/M<sub>i</sub></i>. Definisjonen av den spesifikke fuktigheten lar seg dermed omformes til </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle q={\rho _{v} \over \rho _{d}+\rho _{v}}={p_{v}M_{v} \over p_{d}M_{d}+p_{v}M_{v}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>q</mi> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <msub> <mi>ρ</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>v</mi> </mrow> </msub> <mrow> <msub> <mi>ρ</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>d</mi> </mrow> </msub> <mo>+</mo> <msub> <mi>ρ</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>v</mi> </mrow> </msub> </mrow> </mfrac> </mrow> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mrow> <msub> <mi>p</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>v</mi> </mrow> </msub> <msub> <mi>M</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>v</mi> </mrow> </msub> </mrow> <mrow> <msub> <mi>p</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>d</mi> </mrow> </msub> <msub> <mi>M</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>d</mi> </mrow> </msub> <mo>+</mo> <msub> <mi>p</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>v</mi> </mrow> </msub> <msub> <mi>M</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>v</mi> </mrow> </msub> </mrow> </mfrac> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle q={\rho _{v} \over \rho _{d}+\rho _{v}}={p_{v}M_{v} \over p_{d}M_{d}+p_{v}M_{v}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/7169e664ff94e9759bca274f0e2772307e666629" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -2.338ex; width:30.235ex; height:5.843ex;" alt="{\displaystyle q={\rho _{v} \over \rho _{d}+\rho _{v}}={p_{v}M_{v} \over p_{d}M_{d}+p_{v}M_{v}}}"></span></dd></dl> <p>Trykket til den tørre luften er nå via <a href="/wiki/Daltons_lov" title="Daltons lov">Daltons lov</a> gitt ved totaltrykket <i>p </i> til den fuktige luften som <i>p<sub>d</sub> = p - p<sub>v</sub></i>. Dermed blir </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle q={0.622\,p_{v}/p \over 1-0.378\,p_{v}/p}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>q</mi> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mrow> <mn>0.622</mn> <mspace width="thinmathspace" /> <msub> <mi>p</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>v</mi> </mrow> </msub> <mrow class="MJX-TeXAtom-ORD"> <mo>/</mo> </mrow> <mi>p</mi> </mrow> <mrow> <mn>1</mn> <mo>−</mo> <mn>0.378</mn> <mspace width="thinmathspace" /> <msub> <mi>p</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>v</mi> </mrow> </msub> <mrow class="MJX-TeXAtom-ORD"> <mo>/</mo> </mrow> <mi>p</mi> </mrow> </mfrac> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle q={0.622\,p_{v}/p \over 1-0.378\,p_{v}/p}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/a289fd38140ccdd2e72c0ad157bf3c03eea38280" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -2.671ex; width:19.222ex; height:6.509ex;" alt="{\displaystyle q={0.622\,p_{v}/p \over 1-0.378\,p_{v}/p}}"></span></dd></dl> <p>etter å ha benyttet at <i>M<sub>v</sub> </i>/<i>M<sub>d</sub></i> = 0.622. Vel under <a href="/wiki/Kokepunkt" title="Kokepunkt">kokepunktet</a> er <i>p<sub>v</sub> </i>/<i>p</i> < 1 slik at man under slike forhold kan finne den spesifikke fuktighten med god nøyaktighet fra <span class="nowrap"><i>q</i> = 0.622 <i>p<sub>v</sub> </i>/<i>p</i></span>. Dette resultatet kan nå sammenlignes med uttrykket for den relative fuktigheten hvor metningstrykket til vanndampen inngår i stedet for det totale lufttrykket.<sup id="cite_ref-Müller_2-2" class="reference"><a href="#cite_note-Müller-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Duggpunktstemperatur">Duggpunktstemperatur</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Luftfuktighet&veaction=edit&section=4" title="Rediger avsnitt: Duggpunktstemperatur" class="mw-editsection-visualeditor"><span>rediger</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Luftfuktighet&action=edit&section=4" title="Rediger kildekoden til seksjonen Duggpunktstemperatur"><span>rediger kilde</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><a href="/wiki/Duggpunktstemperatur" class="mw-redirect" title="Duggpunktstemperatur">Duggpunktstemperatur</a> er den temperaturen den aktuelle lufta må avkjøles til for at fuktigheten i lufta gir en mettet luftfuktighet. Forskjellen mellom temperaturen og duggpunktstemperaturen kan fortelle noe om hvor høyt over bakken skyenes underside, <a href="/wiki/Skybase" title="Skybase">skybasen</a> er. Grovt sett må man bevege seg 100 meter opp for hver grad temperaturforskjell. Ved store forskjeller på bakken vil naturen tørke fort og <a href="/wiki/Skogbrann" title="Skogbrann">skogbrannfaren</a> øker fort. Ved liten forskjell er det fare for at det plutselig danner seg <a href="/wiki/Skyer" class="mw-redirect" title="Skyer">skyer</a> eller <a href="/wiki/T%C3%A5ke" title="Tåke">tåke</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Målemetode"><span id="M.C3.A5lemetode"></span>Målemetode</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Luftfuktighet&veaction=edit&section=5" title="Rediger avsnitt: Målemetode" class="mw-editsection-visualeditor"><span>rediger</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Luftfuktighet&action=edit&section=5" title="Rediger kildekoden til seksjonen Målemetode"><span>rediger kilde</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Fil:Umidaderelativa.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/0/0e/Umidaderelativa.jpg/250px-Umidaderelativa.jpg" decoding="async" width="250" height="381" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/0/0e/Umidaderelativa.jpg/375px-Umidaderelativa.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/0/0e/Umidaderelativa.jpg/500px-Umidaderelativa.jpg 2x" data-file-width="1627" data-file-height="2480" /></a><figcaption>Et <a href="/wiki/Hygrometer" title="Hygrometer">hygrometer</a> blir brukt til å måle <a href="/wiki/Relativ_luftfuktighet" class="mw-redirect" title="Relativ luftfuktighet">relativ luftfuktighet</a>.</figcaption></figure> <p>Det fins forskjellige måleapparater for å måle fuktighet, som psykrometer eller <a href="/wiki/Hygrometer" title="Hygrometer">hygrometer</a>. Satellitter kan brukes til å måle fuktighet på global skala, og kan påvise vanndamp i <a href="/wiki/Troposf%C3%A6ren" title="Troposfæren">troposfæren</a> i høyder mellom 4 og 12 km. Disse satellittene har sensore som er sensitive for <a href="/wiki/Infrar%C3%B8d_str%C3%A5ling" title="Infrarød stråling">infrarød stråling</a>. Vanndamp absorberer og sender ut stråling i dette spektralområdet. Slike satellittmålinger spiller en viktig rolle i overvåking av klima og i utviklingen av værvarsel for framtiden. </p> <div class="mw-heading mw-heading2"><h2 id="Fuktighet_og_lufttetthet">Fuktighet og lufttetthet</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Luftfuktighet&veaction=edit&section=6" title="Rediger avsnitt: Fuktighet og lufttetthet" class="mw-editsection-visualeditor"><span>rediger</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Luftfuktighet&action=edit&section=6" title="Rediger kildekoden til seksjonen Fuktighet og lufttetthet"><span>rediger kilde</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Fuktig luft er lettere, eller har mindre tetthet, enn tørr luft. Dette kommer av at vannmolekylene, H<sub>2</sub>O, veier mindre enn <a href="/wiki/Nitrogen" title="Nitrogen">nitrogen</a>- (N<sub>2</sub>) og <a href="/wiki/Oksygen" title="Oksygen">oksygenmolekylene</a> (O<sub>2</sub>). <a href="/wiki/Isaac_Newton" title="Isaac Newton">Isaac Newton</a> oppdaget dette fenomenet og skrev om det i boken <i>Opticks</i>. </p><p><a href="/wiki/Amedeo_Avogadro" title="Amedeo Avogadro">Avogradros</a> <a href="/wiki/Ideell_gass" title="Ideell gass">ideelle gasslov</a> sier at et visst gassvolum ved en viss temperatur og et visst trykk alltid inneholder samme antall molekyler uansett hvilken gass det er. En kubikkmeter med helt tørr luft inneholder 78 % nitrogenmolekyler, som har en <a href="/wiki/Atomvekt" class="mw-redirect" title="Atomvekt">atomvekt</a> på 28, mens 21 % av luften er oksygen, som har en atomvekt på 32. Den siste prosenten er en blanding av andre gasser. Hvis vannmolekylene erstatter nitrogen- og oksygenmolekyler, vil vekten til denne luften minke, og dermed også tettheten. </p><p>Dette kan virke rart siden vann blir sett på som tyngre enn luft. Det er sant at flytende vann er tyngre enn luft, men fuktig luft inneholder vanndamp og ikke flytende vann, og vanndamp er lettere enn nitrogen- eller oksygengass. </p> <div class="mw-heading mw-heading2"><h2 id="Effekt_på_kroppen"><span id="Effekt_p.C3.A5_kroppen"></span>Effekt på kroppen</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Luftfuktighet&veaction=edit&section=7" title="Rediger avsnitt: Effekt på kroppen" class="mw-editsection-visualeditor"><span>rediger</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Luftfuktighet&action=edit&section=7" title="Rediger kildekoden til seksjonen Effekt på kroppen"><span>rediger kilde</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Menneskekroppen kvitter seg med varme i en kombinasjon av fordampning ved svette, <a href="/wiki/Konduksjon" class="mw-redirect" title="Konduksjon">konduksjon</a> til den omkringliggende luften og varmestråling. Når fuktigheten er høy, vil fordampningsevnen til svetten fra huden minke, og kroppen må streve mer for å holde kroppstemperaturen nede.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> Hvis luften i tillegg er like varm eller varmere enn huden, vil ikke <a href="/wiki/Blod" title="Blod">blodet</a> klare å kvitte seg med varme til luften og en tilstand kalt <a href="/w/index.php?title=Hyperpyrexia&action=edit&redlink=1" class="new" title="Hyperpyrexia (ikke skrevet ennå)">hyperpyrexia</a> kan oppstå. Når mye blod går til de ytre delene av kroppen for å kvitte seg med varme, vil mindre blod gå til aktive <a href="/wiki/Muskel" title="Muskel">muskler</a>, hjernen og andre indre <a href="/wiki/Organ" title="Organ">organer</a>. Den fysiske styrken blir raskt tappet og man blir utmattet mye raskere enn vanlig. Dette fører så til heteslag eller <a href="/wiki/Hypertermi" title="Hypertermi">hypertermi</a>. </p><p>Mennesket har ingen sans for å måle luftfuktighet. Såkalt tørr luft er en illusjon som vanligvis forårsakes av forurensning i lufta; dette kan være støv eller kjemikalier som lekker ut av bygningsmaterialene.<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> En relativ fuktighet på mellom 30 og 60 % oppleves som komfortabel, mens 30-50 % regnes som optimalt for inneklimaet.<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p><p>Er man utsatt for tørr luft over lengre tid kan man få plager som tørr hud, tørre slimhinner, tørt hår og tørre øyne. På grunn av tørre slimhinner kan man lettere bli utsatt for smitte av forkjølelse og influensa. </p> <div class="mw-heading mw-heading2"><h2 id="Se_også"><span id="Se_ogs.C3.A5"></span>Se også</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Luftfuktighet&veaction=edit&section=8" title="Rediger avsnitt: Se også" class="mw-editsection-visualeditor"><span>rediger</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Luftfuktighet&action=edit&section=8" title="Rediger kildekoden til seksjonen Se også"><span>rediger kilde</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Luftfukter" title="Luftfukter">Luftfukter</a></li> <li><a href="/wiki/Luftavfukter" title="Luftavfukter">Luftavfukter</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Referanser">Referanser</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Luftfuktighet&veaction=edit&section=9" title="Rediger avsnitt: Referanser" class="mw-editsection-visualeditor"><span>rediger</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Luftfuktighet&action=edit&section=9" title="Rediger kildekoden til seksjonen Referanser"><span>rediger kilde</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-Grøn-1"><b>^</b> <a href="#cite_ref-Grøn_1-0"><sup>a</sup></a> <a href="#cite_ref-Grøn_1-1"><sup>b</sup></a> <span class="reference-text">Ø.G. Grøn, <i>Termodynamikk for høgskole og universitet</i>, Cappelen Damm, Oslo (2015). <a href="/wiki/Spesial:Bokkilder/9788202420529" class="internal mw-magiclink-isbn">ISBN 978-8202420529</a>.</span> </li> <li id="cite_note-Müller-2"><b>^</b> <a href="#cite_ref-Müller_2-0"><sup>a</sup></a> <a href="#cite_ref-Müller_2-1"><sup>b</sup></a> <a href="#cite_ref-Müller_2-2"><sup>c</sup></a> <span class="reference-text">R. Müller, <i>Thermodynamik: Vom Tautropfen zum Solarkraftwerk</i>, Walter de Gruyther GmbH, Berlin (2014). <a href="/wiki/Spesial:Bokkilder/9783110301984" class="internal mw-magiclink-isbn">ISBN 978-3-11-030198-4</a>.</span> </li> <li id="cite_note-3"><b><a href="#cite_ref-3">^</a></b> <span class="reference-text">NEL, Arbeidsmedisin, <a rel="nofollow" class="external text" href="http://amv.legehandboka.no/handboken/kliniske-kapitler/forebygging/kjemiskbiologisk-eksponering/inneklima/"><i>Inneklima - luftkvalitet</i></a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20170202053026/http://amv.legehandboka.no/handboken/kliniske-kapitler/forebygging/kjemiskbiologisk-eksponering/inneklima/">Arkivert</a> 2. februar 2017 hos <a href="/wiki/Wayback_Machine" title="Wayback Machine">Wayback Machine</a>., Norsk Elektronisk Legehåndbok.</span> </li> <li id="cite_note-4"><b><a href="#cite_ref-4">^</a></b> <span class="reference-text">B.R. Sørensen, <a rel="nofollow" class="external text" href="http://ansatte.hin.no/brs/fag/emner/iaq/pdf/fuktigluft.pdf"><i>Fuktig luft i innemiljøsammenheng</i></a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20170202070724/http://ansatte.hin.no/brs/fag/emner/iaq/pdf/fuktigluft.pdf">Arkivert</a> 2. februar 2017 hos <a href="/wiki/Wayback_Machine" title="Wayback Machine">Wayback Machine</a>., forelesning ved UiT, Narvik.</span> </li> <li id="cite_note-5"><b><a href="#cite_ref-5">^</a></b> <span class="reference-text"><cite class="citation web"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20211005094156/https://bedre-inneklima.no/butikk/ofte-stilte-sporsmal-faq/faq-inneklima/hva-er-riktig-luftfuktighet">«Riktig luftfuktighet angitt av Bedre Inneklima AS»</a>. Arkivert fra <a rel="nofollow" class="external text" href="https://bedre-inneklima.no/butikk/ofte-stilte-sporsmal-faq/faq-inneklima/hva-er-riktig-luftfuktighet">originalen</a> 5. oktober 2021<span class="reference-accessdate">. Besøkt 5. oktober 2021</span>.</cite><span title="ctx_ver=Z39.88-2004&rfr_id=info%3Asid%2Fno.wikipedia.org%3ALuftfuktighet&rft.btitle=Riktig+luftfuktighet+angitt+av+Bedre+Inneklima+AS&rft.genre=unknown&rft_id=https%3A%2F%2Fbedre-inneklima.no%2Fbutikk%2Fofte-stilte-sporsmal-faq%2Ffaq-inneklima%2Fhva-er-riktig-luftfuktighet&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook" class="Z3988"><span style="display:none;"> </span></span></span> </li> </ol></div> <div class="mw-heading mw-heading2"><h2 id="Litteratur">Litteratur</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Luftfuktighet&veaction=edit&section=10" title="Rediger avsnitt: Litteratur" class="mw-editsection-visualeditor"><span>rediger</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Luftfuktighet&action=edit&section=10" title="Rediger kildekoden til seksjonen Litteratur"><span>rediger kilde</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li>E. Lillestøl, O. Hunderi og J.R. Lien, <i>Generell Fysikk, Bind 2</i>, Universitetsforlaget, Oslo (2001). <a href="/wiki/Spesial:Bokkilder/8215000061" class="internal mw-magiclink-isbn">ISBN 82-15-00006-1</a>.</li></ul> <div class="mw-heading mw-heading2"><h2 id="Eksterne_lenker">Eksterne lenker</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Luftfuktighet&veaction=edit&section=11" title="Rediger avsnitt: Eksterne lenker" class="mw-editsection-visualeditor"><span>rediger</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Luftfuktighet&action=edit&section=11" title="Rediger kildekoden til seksjonen Eksterne lenker"><span>rediger kilde</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li>UCSB, <a rel="nofollow" class="external text" href="https://web.archive.org/web/20160718173840/http://www.geog.ucsb.edu/~joel/g266_s10/lecture_notes/chapt03/oh10_3_01/oh10_3_01.html">Water Vapor in the Atmosphere</a>, forelesningsnotat.</li> <li>TIS, <a rel="nofollow" class="external text" href="http://www.tis-gdv.de/tis_e/misc/klima.htm">Climate/Humidity Table</a>, engelsk versjon.</li> <li>The Engineering Toolbox, <a rel="nofollow" class="external text" href="http://www.engineeringtoolbox.com/water-vapor-saturation-pressure-air-d_689.html"><i>Water Vapor and Saturation Pressure in Humid Air</i>.</a></li></ul> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r23230704">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output .hlist dl dl,.mw-parser-output .hlist dl ol,.mw-parser-output .hlist dl ul,.mw-parser-output .hlist ol dl,.mw-parser-output .hlist ol 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