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<!doctype html><html lang="en"><head> <meta charset="utf-8"> <title>Customer Portal Landing Page</title> <link rel="shortcut icon" href="//www.rheosense.com/hs-fs/hub/296746/file-2216342099-png/Logo/Favicon.png"> <meta name="description" content="Password protected portal access for current customers."> <style>@font-face { font-family: "Open Sans"; font-weight: 400; font-style: normal; font-display: swap; src: url("/_hcms/googlefonts/Open_Sans/regular.woff2") format("woff2"), url("/_hcms/googlefonts/Open_Sans/regular.woff") format("woff"), url("/_hcms/googlefonts/Open_Sans/regular.woff2") format("woff2"), url("/_hcms/googlefonts/Open_Sans/regular.woff") format("woff"); } @font-face { font-family: "Open Sans"; font-weight: 500; font-style: normal; font-display: swap; src: url("/_hcms/googlefonts/Open_Sans/500.woff2") format("woff2"), url("/_hcms/googlefonts/Open_Sans/500.woff") format("woff"), url("/_hcms/googlefonts/Open_Sans/regular.woff2") format("woff2"), 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"url": "https://www.rheosense.com/iamacustomer", "address": { "@type": "PostalAddress", "addressCountry": "United States", "addressRegion": "California", "addressLocality": "San Ramon", "postalCode":"94583", "streetAddress": "12667 Alcosta Blvd." }, "knowsLanguage": "en" } </script> <style> a.cta_button{-moz-box-sizing:content-box !important;-webkit-box-sizing:content-box !important;box-sizing:content-box !important;vertical-align:middle}.hs-breadcrumb-menu{list-style-type:none;margin:0px 0px 0px 0px;padding:0px 0px 0px 0px}.hs-breadcrumb-menu-item{float:left;padding:10px 0px 10px 10px}.hs-breadcrumb-menu-divider:before{content:'›';padding-left:10px}.hs-featured-image-link{border:0}.hs-featured-image{float:right;margin:0 0 20px 20px;max-width:50%}@media (max-width: 568px){.hs-featured-image{float:none;margin:0;width:100%;max-width:100%}}.hs-screen-reader-text{clip:rect(1px, 1px, 1px, 1px);height:1px;overflow:hidden;position:absolute !important;width:1px} </style> <link rel="stylesheet" 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https://www.rheosense.com/hs-fs/hubfs/Stock_Photos/Woman%20and%20man%20in%20medical%20research%20working%20on%20technology%20for%20scientific%20research_602489238-min.jpeg?width=2000&name=Woman%20and%20man%20in%20medical%20research%20working%20on%20technology%20for%20scientific%20research_602489238-min.jpeg 2000w, https://www.rheosense.com/hs-fs/hubfs/Stock_Photos/Woman%20and%20man%20in%20medical%20research%20working%20on%20technology%20for%20scientific%20research_602489238-min.jpeg?width=3000&name=Woman%20and%20man%20in%20medical%20research%20working%20on%20technology%20for%20scientific%20research_602489238-min.jpeg 3000w" alt="Woman and man in medical research working on technology for scientific research_602489238-min" style="object-fit: cover;object-position: center;width:100%;height:100%;background-color: rgba( 255, 255, 255, 0.0);" fetchpriority="high" decoding="sync"> </picture><div class="pwr--abs-full pwr-bg-overlay" style=" background: linear-gradient(to bottom, rgba(255, 255, 255, 0.7) 0%, rgba(255, 255, 255, 1.0) 100%); opacity: ; "></div><div class="page-center pwr-hero__info-box "><h1 class="pwr-hero__title pwr-heading-style--h1 pwr--toc-ignore" tmp-data-aos="fade-in" tmp-data-aos-delay="50">Access Customer Portal</h1><div class="pwr-rich-text pwr-hero__desc " tmp-data-aos="fade-in" tmp-data-aos-delay="50"> <h5><span><strong>Password protected portal access for current customers.</strong></span></h5> </div><div class="pwr-cta-container pwr-hero__cta-container pwr--clearfix" tmp-data-aos="fade-in" tmp-data-aos-delay="50"> <div class="pwr--neg-margin-lr-10"><div class="pwr-cta-container__cta pwr-hero__cta pwr-cta pwr-cta--primary-solid "> <a class="pwr-cta_button hs-cta-trigger-button hs-cta-trigger-button-158459181694" href="javascript:postMessage({type:'HS_DISPLAY_CALL_TO_ACTION',id:158459181694});" title="Button Request Access">Request Access</a> </div></div> </div></div> </div></div> </div> </div> </div> <div class="row-fluid-wrapper row-depth-1 row-number-2 dnd_area-row-1-padding dnd-section"> <div class="row-fluid "> <div class="span12 widget-span widget-type-cell dnd-column" style="" data-widget-type="cell" data-x="0" data-w="12"> <div class="row-fluid-wrapper row-depth-1 row-number-3 dnd-row"> <div class="row-fluid "> <div class="span12 widget-span widget-type-custom_widget dnd-module" style="" data-widget-type="custom_widget" data-x="0" data-w="12"> <div id="hs_cos_wrapper_module_16983299521855" class="hs_cos_wrapper hs_cos_wrapper_widget hs_cos_wrapper_type_module" style="" data-hs-cos-general-type="widget" data-hs-cos-type="module"> <div class="pwr-sec-image-boxes pwr-js-masonry vanilla pwr--light pwr--sec-padding-t-sm pwr--sec-padding-b-sm pwr--margin-t-0 pwr--margin-b-0 lazyload" style=""> <div class="page-center pwr--relative"> <div class="row-fluid"> <div class="pwr-sec-image-boxes__intro-sec pwr-sec__intro-sec pwr-sec-image-boxes__intro-sec--centered pwr--align-c"><h2 class="pwr-sec__title pwr-heading-style--default pwr-sec__title--narrow pwr-sec-image-boxes__title" tmp-data-aos="fade-in" tmp-data-aos-delay="50">Which Instrument do you have?</h2></div> </div> </div><div class="page-center pwr--relative"> <div class="row-fluid "> <div class="span12"> <div class="pwr-sec-image-boxes__container pwr-js-masonry__container pwr--neg-margin-lr-10 pwr-js-masonry__container--no-gutter pwr-js-masonry__container--fitRows pwr-sec-image-boxes__container--centered pwr--align-c pwr--clearfix "><a href="https://www.rheosense.com/customer-access/vrocinitiumoneplus?hsLang=en" class="pwr-image-box pwr-image-box--3cols pwr-js-masonry__item pwr-image-box--style-below-1 pwr-image-box--one-by-one pwr-image-box--is-link " tmp-data-aos="fade-in" tmp-data-aos-delay="50" data-category=""> <div class="pwr-3D-box"> <div class="pwr-image-box__img pwr-3D-box__sensor pwr-3D-box--shaddow-on-hover"> <img data-src="https://www.rheosense.com/hs-fs/hubfs/Initium%20One%20Plus.png?width=300&name=Initium%20One%20Plus.png" data-srcset="https://www.rheosense.com/hs-fs/hubfs/Initium%20One%20Plus.png?width=300&name=Initium%20One%20Plus.png 300w , https://www.rheosense.com/hs-fs/hubfs/Initium%20One%20Plus.png?width=575&name=Initium%20One%20Plus.png 575w , https://www.rheosense.com/hs-fs/hubfs/Initium%20One%20Plus.png?width=767&name=Initium%20One%20Plus.png 767w , https://www.rheosense.com/hs-fs/hubfs/Initium%20One%20Plus.png?width=810&name=Initium%20One%20Plus.png 810w " data-sizes="auto" data-maxRetina="1.5" class="lazyload pwr-background-img" alt="Initium One Plus" style="object-fit: cover;object-position: center;"> <div class="pwr-image-box__overlay "></div> <div class="pwr-3D-box__info-box pwr-3D-box__info-box--centered"> <span class="pwr-image-box__more-link pwr-image-box__more-link--centered">Go to page<span class="pwr-image-box__icon "><span id="hs_cos_wrapper_module_16983299521855_" class="hs_cos_wrapper hs_cos_wrapper_widget hs_cos_wrapper_type_icon" style="" data-hs-cos-general-type="widget" data-hs-cos-type="icon"><svg version="1.0" xmlns="http://www.w3.org/2000/svg" viewbox="0 0 256 512" aria-hidden="true"><g id="angle-right1_layer"><path d="M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z" /></g></svg></span></span></span> </div> </div> </div> <div class="pwr-image-box__below"><span class="pwr-image-box__intro">VROC Initium One Plus</span><span class="pwr-image-box__more-link pwr-image-box__more-link--mobile">Go to page<span class="pwr-image-box__icon "><span id="hs_cos_wrapper_module_16983299521855_" class="hs_cos_wrapper hs_cos_wrapper_widget hs_cos_wrapper_type_icon" style="" data-hs-cos-general-type="widget" data-hs-cos-type="icon"><svg version="1.0" xmlns="http://www.w3.org/2000/svg" viewbox="0 0 256 512" aria-hidden="true"><g id="angle-right1_layer"><path d="M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z" /></g></svg></span></span></span> </div> </a><a href="https://www.rheosense.com/customer-access/m-vroc-ii?hsLang=en" class="pwr-image-box pwr-image-box--3cols pwr-js-masonry__item pwr-image-box--style-below-1 pwr-image-box--one-by-one pwr-image-box--is-link " tmp-data-aos="fade-in" tmp-data-aos-delay="50" data-category=""> <div class="pwr-3D-box"> <div class="pwr-image-box__img pwr-3D-box__sensor pwr-3D-box--shaddow-on-hover"> <img data-src="https://www.rheosense.com/hs-fs/hubfs/CTA/m-VROC%20II%20CTA%20Customer%20Portal-1.png?width=300&name=m-VROC%20II%20CTA%20Customer%20Portal-1.png" data-srcset="https://www.rheosense.com/hs-fs/hubfs/CTA/m-VROC%20II%20CTA%20Customer%20Portal-1.png?width=300&name=m-VROC%20II%20CTA%20Customer%20Portal-1.png 300w , https://www.rheosense.com/hs-fs/hubfs/CTA/m-VROC%20II%20CTA%20Customer%20Portal-1.png?width=575&name=m-VROC%20II%20CTA%20Customer%20Portal-1.png 575w , https://www.rheosense.com/hs-fs/hubfs/CTA/m-VROC%20II%20CTA%20Customer%20Portal-1.png?width=767&name=m-VROC%20II%20CTA%20Customer%20Portal-1.png 767w , https://www.rheosense.com/hs-fs/hubfs/CTA/m-VROC%20II%20CTA%20Customer%20Portal-1.png?width=991&name=m-VROC%20II%20CTA%20Customer%20Portal-1.png 991w , https://www.rheosense.com/hs-fs/hubfs/CTA/m-VROC%20II%20CTA%20Customer%20Portal-1.png?width=1014&name=m-VROC%20II%20CTA%20Customer%20Portal-1.png 1014w " data-sizes="auto" data-maxRetina="1.5" class="lazyload pwr-background-img" alt="m-VROC II CTA Customer Portal-1" style="object-fit: cover;object-position: center;"> <div class="pwr-image-box__overlay "></div> <div class="pwr-3D-box__info-box pwr-3D-box__info-box--centered"> <span class="pwr-image-box__more-link pwr-image-box__more-link--centered">Go to page<span class="pwr-image-box__icon "><span id="hs_cos_wrapper_module_16983299521855_" class="hs_cos_wrapper hs_cos_wrapper_widget hs_cos_wrapper_type_icon" style="" data-hs-cos-general-type="widget" data-hs-cos-type="icon"><svg version="1.0" xmlns="http://www.w3.org/2000/svg" viewbox="0 0 256 512" aria-hidden="true"><g id="angle-right1_layer"><path d="M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z" /></g></svg></span></span></span> </div> </div> </div> <div class="pwr-image-box__below"><span class="pwr-image-box__intro">m-VROC II</span><span class="pwr-image-box__more-link pwr-image-box__more-link--mobile">Go to page<span class="pwr-image-box__icon "><span id="hs_cos_wrapper_module_16983299521855_" class="hs_cos_wrapper hs_cos_wrapper_widget hs_cos_wrapper_type_icon" style="" data-hs-cos-general-type="widget" data-hs-cos-type="icon"><svg version="1.0" xmlns="http://www.w3.org/2000/svg" viewbox="0 0 256 512" aria-hidden="true"><g id="angle-right1_layer"><path d="M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z" /></g></svg></span></span></span> </div> </a><a href="https://www.rheosense.com/customer-access/microvisc?hsLang=en" class="pwr-image-box pwr-image-box--3cols pwr-js-masonry__item pwr-image-box--style-below-1 pwr-image-box--one-by-one pwr-image-box--is-link " tmp-data-aos="fade-in" tmp-data-aos-delay="50" data-category=""> <div class="pwr-3D-box"> <div class="pwr-image-box__img pwr-3D-box__sensor pwr-3D-box--shaddow-on-hover"> <img data-src="https://www.rheosense.com/hs-fs/hubfs/Website%20Files/microVISC-m%20thumbnail%20Image%20(Act21%20Home).png?width=300&name=microVISC-m%20thumbnail%20Image%20(Act21%20Home).png" data-srcset="https://www.rheosense.com/hs-fs/hubfs/Website%20Files/microVISC-m%20thumbnail%20Image%20(Act21%20Home).png?width=300&name=microVISC-m%20thumbnail%20Image%20(Act21%20Home).png 300w , https://www.rheosense.com/hs-fs/hubfs/Website%20Files/microVISC-m%20thumbnail%20Image%20(Act21%20Home).png?width=500&name=microVISC-m%20thumbnail%20Image%20(Act21%20Home).png 500w " data-sizes="auto" data-maxRetina="1.5" class="lazyload pwr-background-img" alt="microVISC-m thumbnail Image (Act21 Home)" style="object-fit: cover;object-position: center;"> <div class="pwr-image-box__overlay "></div> <div class="pwr-3D-box__info-box pwr-3D-box__info-box--centered"> <span class="pwr-image-box__more-link pwr-image-box__more-link--centered">Go to page<span class="pwr-image-box__icon "><span id="hs_cos_wrapper_module_16983299521855_" class="hs_cos_wrapper hs_cos_wrapper_widget hs_cos_wrapper_type_icon" style="" data-hs-cos-general-type="widget" data-hs-cos-type="icon"><svg version="1.0" xmlns="http://www.w3.org/2000/svg" viewbox="0 0 256 512" aria-hidden="true"><g id="angle-right1_layer"><path d="M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z" /></g></svg></span></span></span> </div> </div> </div> <div class="pwr-image-box__below"><span class="pwr-image-box__intro">Portable Viscometer <i>micro</i>VISC<sup>TM</sup></span><span class="pwr-image-box__more-link pwr-image-box__more-link--mobile">Go to page<span class="pwr-image-box__icon "><span id="hs_cos_wrapper_module_16983299521855_" class="hs_cos_wrapper hs_cos_wrapper_widget hs_cos_wrapper_type_icon" style="" data-hs-cos-general-type="widget" data-hs-cos-type="icon"><svg version="1.0" xmlns="http://www.w3.org/2000/svg" viewbox="0 0 256 512" aria-hidden="true"><g id="angle-right1_layer"><path d="M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z" /></g></svg></span></span></span> </div> </a><a href="https://www.rheosense.com/customer-access/chip-cleaning-station?hsLang=en" class="pwr-image-box pwr-image-box--3cols pwr-js-masonry__item pwr-image-box--style-below-1 pwr-image-box--one-by-one pwr-image-box--is-link " tmp-data-aos="fade-in" tmp-data-aos-delay="50" data-category=""> <div class="pwr-3D-box"> <div class="pwr-image-box__img pwr-3D-box__sensor pwr-3D-box--shaddow-on-hover"> <img data-src="https://www.rheosense.com/hs-fs/hubfs/Product_Folder/Chip%20Cleaning%20Station%20-%20CCS/Chip%20Cleaning%20Station%20-%20No%20BDG-1.png?width=300&name=Chip%20Cleaning%20Station%20-%20No%20BDG-1.png" data-srcset="https://www.rheosense.com/hs-fs/hubfs/Product_Folder/Chip%20Cleaning%20Station%20-%20CCS/Chip%20Cleaning%20Station%20-%20No%20BDG-1.png?width=300&name=Chip%20Cleaning%20Station%20-%20No%20BDG-1.png 300w , https://www.rheosense.com/hs-fs/hubfs/Product_Folder/Chip%20Cleaning%20Station%20-%20CCS/Chip%20Cleaning%20Station%20-%20No%20BDG-1.png?width=575&name=Chip%20Cleaning%20Station%20-%20No%20BDG-1.png 575w , https://www.rheosense.com/hs-fs/hubfs/Product_Folder/Chip%20Cleaning%20Station%20-%20CCS/Chip%20Cleaning%20Station%20-%20No%20BDG-1.png?width=767&name=Chip%20Cleaning%20Station%20-%20No%20BDG-1.png 767w , https://www.rheosense.com/hs-fs/hubfs/Product_Folder/Chip%20Cleaning%20Station%20-%20CCS/Chip%20Cleaning%20Station%20-%20No%20BDG-1.png?width=991&name=Chip%20Cleaning%20Station%20-%20No%20BDG-1.png 991w , https://www.rheosense.com/hs-fs/hubfs/Product_Folder/Chip%20Cleaning%20Station%20-%20CCS/Chip%20Cleaning%20Station%20-%20No%20BDG-1.png?width=1199&name=Chip%20Cleaning%20Station%20-%20No%20BDG-1.png 1199w , https://www.rheosense.com/hs-fs/hubfs/Product_Folder/Chip%20Cleaning%20Station%20-%20CCS/Chip%20Cleaning%20Station%20-%20No%20BDG-1.png?width=2000&name=Chip%20Cleaning%20Station%20-%20No%20BDG-1.png 2000w , https://www.rheosense.com/hs-fs/hubfs/Product_Folder/Chip%20Cleaning%20Station%20-%20CCS/Chip%20Cleaning%20Station%20-%20No%20BDG-1.png?width=2476&name=Chip%20Cleaning%20Station%20-%20No%20BDG-1.png 2476w " data-sizes="auto" data-maxRetina="1.5" class="lazyload pwr-background-img" alt="Chip Cleaning Station - No BDG-1" style="object-fit: cover;object-position: center;"> <div class="pwr-image-box__overlay "></div> <div class="pwr-3D-box__info-box pwr-3D-box__info-box--centered"> <span class="pwr-image-box__more-link pwr-image-box__more-link--centered">Go to page<span class="pwr-image-box__icon "><span id="hs_cos_wrapper_module_16983299521855_" class="hs_cos_wrapper hs_cos_wrapper_widget hs_cos_wrapper_type_icon" style="" data-hs-cos-general-type="widget" data-hs-cos-type="icon"><svg version="1.0" xmlns="http://www.w3.org/2000/svg" viewbox="0 0 256 512" aria-hidden="true"><g id="angle-right1_layer"><path d="M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z" /></g></svg></span></span></span> </div> </div> </div> <div class="pwr-image-box__below"><span class="pwr-image-box__intro">Chip Cleaning Station</span><span class="pwr-image-box__more-link pwr-image-box__more-link--mobile">Go to page<span class="pwr-image-box__icon "><span id="hs_cos_wrapper_module_16983299521855_" class="hs_cos_wrapper hs_cos_wrapper_widget hs_cos_wrapper_type_icon" style="" data-hs-cos-general-type="widget" data-hs-cos-type="icon"><svg version="1.0" xmlns="http://www.w3.org/2000/svg" viewbox="0 0 256 512" aria-hidden="true"><g id="angle-right1_layer"><path d="M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z" /></g></svg></span></span></span> </div> </a><a href="https://www.rheosense.com/customer-access/e-vroc?hsLang=en" class="pwr-image-box pwr-image-box--3cols pwr-js-masonry__item pwr-image-box--style-below-1 pwr-image-box--one-by-one pwr-image-box--is-link " tmp-data-aos="fade-in" tmp-data-aos-delay="50" data-category=""> <div class="pwr-3D-box"> <div class="pwr-image-box__img pwr-3D-box__sensor pwr-3D-box--shaddow-on-hover"> <img data-src="https://www.rheosense.com/hs-fs/hubfs/Website%20Files/e-VROC%20product%20Page.jpg?width=300&name=e-VROC%20product%20Page.jpg" data-srcset="https://www.rheosense.com/hs-fs/hubfs/Website%20Files/e-VROC%20product%20Page.jpg?width=300&name=e-VROC%20product%20Page.jpg 300w , https://www.rheosense.com/hs-fs/hubfs/Website%20Files/e-VROC%20product%20Page.jpg?width=575&name=e-VROC%20product%20Page.jpg 575w , https://www.rheosense.com/hs-fs/hubfs/Website%20Files/e-VROC%20product%20Page.jpg?width=767&name=e-VROC%20product%20Page.jpg 767w , https://www.rheosense.com/hs-fs/hubfs/Website%20Files/e-VROC%20product%20Page.jpg?width=991&name=e-VROC%20product%20Page.jpg 991w , https://www.rheosense.com/hs-fs/hubfs/Website%20Files/e-VROC%20product%20Page.jpg?width=1199&name=e-VROC%20product%20Page.jpg 1199w , https://www.rheosense.com/hs-fs/hubfs/Website%20Files/e-VROC%20product%20Page.jpg?width=1350&name=e-VROC%20product%20Page.jpg 1350w " data-sizes="auto" data-maxRetina="1.5" class="lazyload pwr-background-img" alt="e-VROC product Page" style="object-fit: cover;object-position: center;"> <div class="pwr-image-box__overlay "></div> <div class="pwr-3D-box__info-box pwr-3D-box__info-box--centered"> <span class="pwr-image-box__more-link pwr-image-box__more-link--centered">Go to page<span class="pwr-image-box__icon "><span id="hs_cos_wrapper_module_16983299521855_" class="hs_cos_wrapper 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class="pwr-image-box__more-link pwr-image-box__more-link--centered">Go to page<span class="pwr-image-box__icon "><span id="hs_cos_wrapper_module_16983299521855_" class="hs_cos_wrapper hs_cos_wrapper_widget hs_cos_wrapper_type_icon" style="" data-hs-cos-general-type="widget" data-hs-cos-type="icon"><svg version="1.0" xmlns="http://www.w3.org/2000/svg" viewbox="0 0 256 512" aria-hidden="true"><g id="angle-right1_layer"><path d="M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z" /></g></svg></span></span></span> </div> </div> </div> <div class="pwr-image-box__below"><span class="pwr-image-box__intro">VROC<sup>®</sup> initium Automatic Viscometer</span><span class="pwr-image-box__more-link pwr-image-box__more-link--mobile">Go to page<span class="pwr-image-box__icon "><span id="hs_cos_wrapper_module_16983299521855_" class="hs_cos_wrapper 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alt="Sample Test Customer Portal-1" style="object-fit: cover;object-position: center;"> <div class="pwr-image-box__overlay "></div> <div class="pwr-3D-box__info-box pwr-3D-box__info-box--centered"> <span class="pwr-image-box__more-link pwr-image-box__more-link--centered">Go to page<span class="pwr-image-box__icon "><span id="hs_cos_wrapper_module_16983299521855_" class="hs_cos_wrapper hs_cos_wrapper_widget hs_cos_wrapper_type_icon" style="" data-hs-cos-general-type="widget" data-hs-cos-type="icon"><svg version="1.0" xmlns="http://www.w3.org/2000/svg" viewbox="0 0 256 512" aria-hidden="true"><g id="angle-right1_layer"><path d="M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z" /></g></svg></span></span></span> </div> </div> </div> <div class="pwr-image-box__below"><span class="pwr-image-box__intro">Sample Testing Services</span><span class="pwr-image-box__more-link pwr-image-box__more-link--mobile">Go to page<span class="pwr-image-box__icon "><span id="hs_cos_wrapper_module_16983299521855_" class="hs_cos_wrapper hs_cos_wrapper_widget hs_cos_wrapper_type_icon" style="" data-hs-cos-general-type="widget" data-hs-cos-type="icon"><svg version="1.0" xmlns="http://www.w3.org/2000/svg" viewbox="0 0 256 512" aria-hidden="true"><g id="angle-right1_layer"><path d="M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z" /></g></svg></span></span></span> </div> </a></div> </div> </div> </div> </div></div> </div> </div> </div> </div> </div> </div> <div class="row-fluid-wrapper row-depth-1 row-number-4 dnd_area-row-2-padding dnd-section"> <div class="row-fluid "> <div class="span12 widget-span widget-type-cell dnd-column" style="" data-widget-type="cell" data-x="0" data-w="12"> <div class="row-fluid-wrapper row-depth-1 row-number-5 dnd-row"> <div class="row-fluid "> <div class="span12 widget-span widget-type-custom_widget dnd-module" style="" data-widget-type="custom_widget" data-x="0" data-w="12"> <div id="hs_cos_wrapper_widget_1699028896193" class="hs_cos_wrapper hs_cos_wrapper_widget hs_cos_wrapper_type_module" style="" data-hs-cos-general-type="widget" data-hs-cos-type="module"> <div class="pwr-sec-accordion vanilla pwr--light pwr--padding-t-0 pwr--padding-b-0 pwr--margin-t-0 pwr--margin-b-0 lazyload" style=""> <div class="page-center pwr--relative "><div class="pwr-sec-accordion__intro-sec pwr-sec__intro-sec"><h2 class="pwr-sec__title pwr-heading-style--default pwr-sec__title--narrow pwr-sec-accordion__title" tmp-data-aos="fade-in" tmp-data-aos-delay="50">VROC Technology FAQ</h2></div><div class="pwr-accordion-container pwr--light pwr--align-l pwr--clearfix "><div class="pwr-accordion-2col"><div class="pwr-accordion pwr-accordion--box pwr-accordion--color-overwritten pwr--colored-box " tmp-data-aos="fade-in" tmp-data-aos-delay="50"> <span class="pwr-accordion__title" style="background-color: rgba(244, 246, 250, 1.0)">What Are the Dimensions of a VROC Chip?<i class="pwr-accordion__icon "></i></span> <span class="pwr-rich-text pwr-accordion__desc" style="background-color: rgba(244, 246, 250, 1.0); "><div class="hs-richtext"> <p><span>internal dimensions:</span></p> <p><span>W = </span><span>2</span><span>.1 [mm]</span><span>(typically)</span></p> <p><span>h = 50[um] = 0.05[mm]</span></p> <p><span>l = 12mm</span></p> <p><span>The channel width and length are different for each chip</span></p> </div></span> </div><div class="pwr-accordion pwr-accordion--box pwr-accordion--color-overwritten pwr--colored-box " tmp-data-aos="fade-in" tmp-data-aos-delay="50"> <span class="pwr-accordion__title" style="background-color: rgba(244, 246, 250, 1.0)">What Is the Diameter of the Inlet and Outlet Tubing of the Chips?<i class="pwr-accordion__icon "></i></span> <span class="pwr-rich-text pwr-accordion__desc" style="background-color: rgba(244, 246, 250, 1.0); "><p>The outlet tubing diameter for all chips is 0.055” or 1.2-1.3mm in diameter now (weused to have different sizes before, but unified them this year).For microVISC™chips,inlet is part of sensor cartridge front that has a 0.028” (0.7mm) hole.m-VROC®chips inlet tubing depends on what type of chips.0.25 mm is for A and B-type; 0.5mm is for C-type and 1.0mm for E-type.But B10, B20 and B30 use 0.5mm tubing.</p></span> </div><div class="pwr-accordion pwr-accordion--box pwr-accordion--color-overwritten pwr--colored-box " tmp-data-aos="fade-in" tmp-data-aos-delay="50"> <span class="pwr-accordion__title" style="background-color: rgba(244, 246, 250, 1.0)">How Many Microliters Can Fill up the Flow Channel at a Time?<i class="pwr-accordion__icon "></i></span> <span class="pwr-rich-text pwr-accordion__desc" style="background-color: rgba(244, 246, 250, 1.0); ">RheoSense VROC chips come in various flow channel depths, 50 microns, 100, 200, and 300 (we can also customize). In a 50 micron flow channel depth chip, about 1.2 microliters can fill up the whole flow channel. For a 100 micron flow channel depth, it will be about 2.4 microliters and so on.</span> </div></div> <div class="pwr-accordion-2col"><div class="pwr-accordion pwr-accordion--box pwr-accordion--color-overwritten pwr--colored-box " tmp-data-aos="fade-in" tmp-data-aos-delay="50"> <span class="pwr-accordion__title" style="background-color: rgba(244, 246, 250, 1.0)">What Are the Wetted Materials?<i class="pwr-accordion__icon "></i></span> <span class="pwr-rich-text pwr-accordion__desc" style="background-color: rgba(244, 246, 250, 1.0); ">RheoSense VROC chips contain of PEEK, Kalrez, Si, Platinum, PFA, and Borosilicate Glass. These components are comprised of the ‘wetted materials’, which refers to where the samples will go through and what components the samples will interact with in the chip.</span> </div><div class="pwr-accordion pwr-accordion--box pwr-accordion--color-overwritten pwr--colored-box " tmp-data-aos="fade-in" tmp-data-aos-delay="50"> <span class="pwr-accordion__title" style="background-color: rgba(244, 246, 250, 1.0)">With Vroc Technology, Have You Observed Behavior of Wall Slip or Shear Band Effects?<i class="pwr-accordion__icon "></i></span> <span class="pwr-rich-text pwr-accordion__desc" style="background-color: rgba(244, 246, 250, 1.0); ">Wall slip and/or band effects, contrary to many papers, are often viewed with a particular application at a particular rate. It is not something that happens to all samples at any parameter or any shear rate. A good example of when you will see this is with polymer melts at a particular shear rate. In that case, it may be a good thing to review and know your shear limitations based on your applications.</span> </div><div class="pwr-accordion pwr-accordion--box pwr-accordion--color-overwritten pwr--colored-box " tmp-data-aos="fade-in" tmp-data-aos-delay="50"> <span class="pwr-accordion__title" style="background-color: rgba(244, 246, 250, 1.0)">Why Do Rheosense Viscometers Vary in Temperature Control if Vroc Technology Is the Same?<i class="pwr-accordion__icon "></i></span> <span class="pwr-rich-text pwr-accordion__desc" style="background-color: rgba(244, 246, 250, 1.0); "><div class="hs-richtext"> <p><span data-contrast="auto">The reason for the temperature difference is with the unique specifications of each viscometer type and the separate Peltier heating and cooling units that are specific to the type of viscometer being used, i.e.) </span><i><span data-contrast="auto">hts</span></i><i><span data-contrast="auto">-</span></i><span data-contrast="auto">VROC<sup>®</sup>, </span><i><span data-contrast="auto">m</span></i><span data-contrast="auto">-VROC<sup>®</sup>, </span><i><span data-contrast="auto">micro</span></i><span data-contrast="auto">VISC. In other words, </span><i><span data-contrast="auto">micro</span></i><span data-contrast="auto">VISC<sup>™</sup> units and VROC<sup>®</sup> chips are stable in the 18-50 °C range and the associated Peltier units are specific to this range. </span><i><span data-contrast="auto">m</span></i><span data-contrast="auto">-VROC and </span><i><span data-contrast="auto">hts</span></i><i><span data-contrast="auto">-</span></i><span data-contrast="auto">VROC units and chips are built to withstand greater temperature gradients.</span><span data-ccp-props="{"201341983":0,"335559738":120,"335559739":200,"335559740":264}"> </span></p> <p><span data-contrast="auto">The VROC flow channel technology is the same across the entire suite of our viscometers. The difference is in the surrounding components, which are designed to operate in a much wider temperature range.</span><span data-ccp-props="{"201341983":0,"335559738":120,"335559739":200,"335559740":264}"> </span></p> </div></span> </div></div></div> </div> </div></div> </div> </div> </div> </div> </div> </div> <div class="row-fluid-wrapper row-depth-1 row-number-6 dnd-section dnd_area-row-3-padding"> <div class="row-fluid "> <div class="span12 widget-span widget-type-cell dnd-column" style="" data-widget-type="cell" data-x="0" data-w="12"> <div class="row-fluid-wrapper row-depth-1 row-number-7 dnd-row"> <div class="row-fluid "> <div class="span12 widget-span widget-type-custom_widget dnd-module" style="" data-widget-type="custom_widget" data-x="0" data-w="12"> <div id="hs_cos_wrapper_module_16990296156014" class="hs_cos_wrapper hs_cos_wrapper_widget hs_cos_wrapper_type_module" style="" data-hs-cos-general-type="widget" data-hs-cos-type="module"> <div class="pwr-sec-accordion vanilla pwr--light pwr--padding-t-0 pwr--padding-b-0 pwr--margin-t-0 pwr--margin-b-0 lazyload" style=""> <div class="page-center pwr--relative "><div class="pwr-sec-accordion__intro-sec pwr-sec__intro-sec"><h2 class="pwr-sec__title pwr-heading-style--default pwr-sec__title--narrow pwr-sec-accordion__title" tmp-data-aos="fade-in" tmp-data-aos-delay="50">Measuring Viscosity FAQ</h2></div><div class="pwr-accordion-container pwr--light pwr--align-l pwr--clearfix "><div class="pwr-accordion-2col"><div class="pwr-accordion pwr-accordion--box pwr-accordion--color-overwritten pwr--colored-box " tmp-data-aos="fade-in" tmp-data-aos-delay="50"> <span class="pwr-accordion__title" style="background-color: rgba(244, 246, 250, 1.0)">How Do I Use a Temperature Dependence Model to Fit My Viscosity Measurements Without Temperature Control?<i class="pwr-accordion__icon "></i></span> <span class="pwr-rich-text pwr-accordion__desc" style="background-color: rgba(244, 246, 250, 1.0); "><div class="hs-richtext"> <div data-accordion-group="MyAccordion" data-accordion-anchor=""> <div class="hs-richtext"> <p>*NOTE: THIS WILL ONLY APPLY TO NEWTONIAN SAMPLES. If you do not know if your sample is Newtonian then stop immediately and figure out that part first. The way to figure out if your sample is Newtonian or non-Newtonian is to run at various shear rates. If you need guidance on this, please contact us at <a href="mailto:info@rheosense.com">info@rheosense.com</a></p> <p>Your sample is Newtonian? Then we use an “Arrhenius-like” Equation to model the viscosity of a fluid with a change in temperature, as shown in the equation before. Typically, as temperature goes up, viscosity will go down.<img src="https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-07-23-37-30-PM.png?width=98&name=image-png-Sep-09-2020-07-23-37-30-PM.png" width="98" srcset="https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-07-23-37-30-PM.png?width=49&name=image-png-Sep-09-2020-07-23-37-30-PM.png 49w, https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-07-23-37-30-PM.png?width=98&name=image-png-Sep-09-2020-07-23-37-30-PM.png 98w, https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-07-23-37-30-PM.png?width=147&name=image-png-Sep-09-2020-07-23-37-30-PM.png 147w, https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-07-23-37-30-PM.png?width=196&name=image-png-Sep-09-2020-07-23-37-30-PM.png 196w, https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-07-23-37-30-PM.png?width=245&name=image-png-Sep-09-2020-07-23-37-30-PM.png 245w, https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-07-23-37-30-PM.png?width=294&name=image-png-Sep-09-2020-07-23-37-30-PM.png 294w" sizes="(max-width: 98px) 100vw, 98px" loading="lazy"></p> <ul> <li>𝜂= Viscosity</li> <li>𝑅= Gas constant</li> <li>𝐸<sub>𝑎</sub>= Arrhenius activation energy</li> <li>𝐴= Pre-exponential factor</li> <li>T = Temperature(ambient or measured temperature in °C)</li> </ul> <p>It is like the sameArrhenius equation used to model the rate of a chemical reaction, except the absence of a negative sign to cause viscosity to lower with increasing temperature. When written in logarithmic terms, the equation looks like this:<img src="https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-07-24-33-23-PM.png?width=144&name=image-png-Sep-09-2020-07-24-33-23-PM.png" width="144" srcset="https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-07-24-33-23-PM.png?width=72&name=image-png-Sep-09-2020-07-24-33-23-PM.png 72w, https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-07-24-33-23-PM.png?width=144&name=image-png-Sep-09-2020-07-24-33-23-PM.png 144w, https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-07-24-33-23-PM.png?width=216&name=image-png-Sep-09-2020-07-24-33-23-PM.png 216w, https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-07-24-33-23-PM.png?width=288&name=image-png-Sep-09-2020-07-24-33-23-PM.png 288w, https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-07-24-33-23-PM.png?width=360&name=image-png-Sep-09-2020-07-24-33-23-PM.png 360w, https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-07-24-33-23-PM.png?width=432&name=image-png-Sep-09-2020-07-24-33-23-PM.png 432w" sizes="(max-width: 144px) 100vw, 144px" loading="lazy"></p> <p>If the fluid tested obeys this equation, then a plot of the viscosity versus reciprocal absolute temperature (aka Kelvins) should be linear. Here, ln(A) is the intercept of this plot (b), Ea/R is the slope(m), and 1/T is x. When substituted, this equation is formed:<img src="https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-07-25-13-15-PM.png?width=107&name=image-png-Sep-09-2020-07-25-13-15-PM.png" width="107" srcset="https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-07-25-13-15-PM.png?width=54&name=image-png-Sep-09-2020-07-25-13-15-PM.png 54w, https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-07-25-13-15-PM.png?width=107&name=image-png-Sep-09-2020-07-25-13-15-PM.png 107w, https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-07-25-13-15-PM.png?width=161&name=image-png-Sep-09-2020-07-25-13-15-PM.png 161w, https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-07-25-13-15-PM.png?width=214&name=image-png-Sep-09-2020-07-25-13-15-PM.png 214w, https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-07-25-13-15-PM.png?width=268&name=image-png-Sep-09-2020-07-25-13-15-PM.png 268w, https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-07-25-13-15-PM.png?width=321&name=image-png-Sep-09-2020-07-25-13-15-PM.png 321w" sizes="(max-width: 107px) 100vw, 107px" loading="lazy"></p> <p>To get viscosity, the exponential is added back into the equation:</p> <p><img src="https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-07-25-47-31-PM.png?width=83&name=image-png-Sep-09-2020-07-25-47-31-PM.png" width="83" srcset="https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-07-25-47-31-PM.png?width=42&name=image-png-Sep-09-2020-07-25-47-31-PM.png 42w, https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-07-25-47-31-PM.png?width=83&name=image-png-Sep-09-2020-07-25-47-31-PM.png 83w, https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-07-25-47-31-PM.png?width=125&name=image-png-Sep-09-2020-07-25-47-31-PM.png 125w, https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-07-25-47-31-PM.png?width=166&name=image-png-Sep-09-2020-07-25-47-31-PM.png 166w, https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-07-25-47-31-PM.png?width=208&name=image-png-Sep-09-2020-07-25-47-31-PM.png 208w, https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-07-25-47-31-PM.png?width=249&name=image-png-Sep-09-2020-07-25-47-31-PM.png 249w" sizes="(max-width: 83px) 100vw, 83px" loading="lazy"></p> <p>This is then converted into our final equation:<img src="https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-07-26-15-23-PM.png?width=74&name=image-png-Sep-09-2020-07-26-15-23-PM.png" width="74" srcset="https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-07-26-15-23-PM.png?width=37&name=image-png-Sep-09-2020-07-26-15-23-PM.png 37w, https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-07-26-15-23-PM.png?width=74&name=image-png-Sep-09-2020-07-26-15-23-PM.png 74w, https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-07-26-15-23-PM.png?width=111&name=image-png-Sep-09-2020-07-26-15-23-PM.png 111w, https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-07-26-15-23-PM.png?width=148&name=image-png-Sep-09-2020-07-26-15-23-PM.png 148w, https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-07-26-15-23-PM.png?width=185&name=image-png-Sep-09-2020-07-26-15-23-PM.png 185w, https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-07-26-15-23-PM.png?width=222&name=image-png-Sep-09-2020-07-26-15-23-PM.png 222w" sizes="(max-width: 74px) 100vw, 74px" loading="lazy"></p> </div> </div> <div data-accordion-group="MyAccordion" data-accordion-anchor=""> <div> <div> <div><i> </i></div> </div> <div> </div> </div> </div> </div></span> </div><div class="pwr-accordion pwr-accordion--box pwr-accordion--color-overwritten pwr--colored-box " tmp-data-aos="fade-in" tmp-data-aos-delay="50"> <span class="pwr-accordion__title" style="background-color: rgba(244, 246, 250, 1.0)">How Do I Measure Synovial Fluid?<i class="pwr-accordion__icon "></i></span> <span class="pwr-rich-text pwr-accordion__desc" style="background-color: rgba(244, 246, 250, 1.0); "><div class="hs-richtext"> <p><span>To clean the chip, fill the test syringe with 1M NaOH and ru</span><span>n the instrument at 100 μL per </span><span>minute. Run until the syringe is empty. After cleaning, there should still be NaOH in the </span><span>channel. Let the residual NaOH soak in the channel for at least 15 minutes. Then run a </span><span>syringe containing 60% glycerol solution through</span><span>the chip followed by a syringe of 1% </span><span>Aquet. </span></p> <p><span>Test the chip with a standard solution or a solution with known viscosity. You can use the </span><span>60% glycerol solution if you’d like, it should have a viscosity around 9 cP. It depends on </span><span>temperature though. The visc</span><span>osity is approximately 11 cP at 20°C and 8.8 cP at 25°C. If </span><span>you aren’t getting correct viscosity readings and R</span><span>2</span><span>values above 0.996 after soaking </span><span>with NaOH for 15 minutes, repeat this process with a 30 minute and/or 1 hour soak time. </span></p> <p><span>For cleaning the chi</span><span>ps in the future: displace the synovial fluid with a glycerol solution, </span><span>then run 1% Aquet through the instrument. You can continue using the dilute bleach </span><span>solution to disinfect the chip, but make sure you store the chip overnight with 1% Aquet. </span><span>The 60% gly</span><span>cerol should work for almost all of the fluids you test. For the 100 cP synthetic </span><span>solutions you’ll need to make an 85% glycerol solution: 113 cP at 20°C and 81.5 cP at </span><span>25°C. </span></p> <p><span>I would recommend performing the 1M NaOH cleaning once per month moving </span><span>forward.</span></p> </div></span> </div><div class="pwr-accordion pwr-accordion--box pwr-accordion--color-overwritten pwr--colored-box " tmp-data-aos="fade-in" tmp-data-aos-delay="50"> <span class="pwr-accordion__title" style="background-color: rgba(244, 246, 250, 1.0)">Can You Measure Zero Shear Viscosity?<i class="pwr-accordion__icon "></i></span> <span class="pwr-rich-text pwr-accordion__desc" style="background-color: rgba(244, 246, 250, 1.0); "><div data-page-number="3" id="bp-page-3" data-loaded="true"> <div><span>Zero shear vi</span><span>scosity is often confused with the idea that viscosity is at a shear rate of 0 </span><span>1/s. This is NOT the case. Zero shear viscosity refers to the viscosity plateau prior to the </span><span>onset of shear thinning. What this means is that this could occur at very low shear </span><span>rates </span><span>but also for certain materials, it can still also occur at very high shear rates. This will </span><span>depend on the sample type. </span></div> <div data-testid="ba-Layer--region" data-resin-feature="annotations"> <div data-resin-component="regionList"> </div> </div> </div> <div data-page-number="4" id="bp-page-4" data-loaded="true"> <div> </div> </div> <div><span>For Newtonian fluids, there is only one viscosity value at multiple shear rates. This means </span><span>that zero shear viscosity would not be</span><span>relevant or be available at such samples.</span></div></span> </div></div> <div class="pwr-accordion-2col"><div class="pwr-accordion pwr-accordion--box pwr-accordion--color-overwritten pwr--colored-box " tmp-data-aos="fade-in" tmp-data-aos-delay="50"> <span class="pwr-accordion__title" style="background-color: rgba(244, 246, 250, 1.0)">What Is the Equation to Convert Flow Rate to Shear Rate?<i class="pwr-accordion__icon "></i></span> <span class="pwr-rich-text pwr-accordion__desc" style="background-color: rgba(244, 246, 250, 1.0); "><div> <div> </div> </div> <div class="hs-richtext"> <p><span><img src="https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-08-05-32-90-PM.png?width=74&name=image-png-Sep-09-2020-08-05-32-90-PM.png" width="74" srcset="https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-08-05-32-90-PM.png?width=37&name=image-png-Sep-09-2020-08-05-32-90-PM.png 37w, https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-08-05-32-90-PM.png?width=74&name=image-png-Sep-09-2020-08-05-32-90-PM.png 74w, https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-08-05-32-90-PM.png?width=111&name=image-png-Sep-09-2020-08-05-32-90-PM.png 111w, https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-08-05-32-90-PM.png?width=148&name=image-png-Sep-09-2020-08-05-32-90-PM.png 148w, https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-08-05-32-90-PM.png?width=185&name=image-png-Sep-09-2020-08-05-32-90-PM.png 185w, https://www.rheosense.com/hs-fs/hubfs/image-png-Sep-09-2020-08-05-32-90-PM.png?width=222&name=image-png-Sep-09-2020-08-05-32-90-PM.png 222w" sizes="(max-width: 74px) 100vw, 74px" loading="lazy"></span></p> <p><span>The width w = 2000 mm = 2 mm and the height h = 50 mm = 0.05 mm.</span><span>Q is volumetric </span><span>flow rate.</span></p> </div></span> </div><div class="pwr-accordion pwr-accordion--box pwr-accordion--color-overwritten pwr--colored-box " tmp-data-aos="fade-in" tmp-data-aos-delay="50"> <span class="pwr-accordion__title" style="background-color: rgba(244, 246, 250, 1.0)">What Is the Best Way to Test Sample Solubility?<i class="pwr-accordion__icon "></i></span> <span class="pwr-rich-text pwr-accordion__desc" style="background-color: rgba(244, 246, 250, 1.0); "><div class="hs-richtext"> <p>There are some best practices when it comes to testing the solubility between two samples. You can do a quick visual solubility check by mixing the two into a new clean (dust-free) vial and checking the mixture. With this test, we recommend also leaving it together for at least a couple hours and if possible, at least one day to ensure proper miscibility. </p> <p>Separately from this test, with samples such as protein, it may be easier to work with the buffer which your proteins are formulated with. In the cases with formulated proteins, since you are already aware of the buffer, using the buffer to clean, and then a detergent solution or a solution miscible with the buffer will ensure effective cleaning. </p> </div></span> </div><div class="pwr-accordion pwr-accordion--box pwr-accordion--color-overwritten pwr--colored-box " tmp-data-aos="fade-in" tmp-data-aos-delay="50"> <span class="pwr-accordion__title" style="background-color: rgba(244, 246, 250, 1.0)">How Many Shear Rates Do You Recommend to Analyze Regardless if Sample Is Newtonian or Non-newtonian?<i class="pwr-accordion__icon "></i></span> <span class="pwr-rich-text pwr-accordion__desc" style="background-color: rgba(244, 246, 250, 1.0); "><div class="hs-richtext"> <div class="hs-richtext"> <div> <p>We recommend a minimum of three different shear rates when analyzing your samples to determine whether they are Newtonian or non-Newtonian. Separately, the shear rates should have a wide range. The reason for the wide range is because many are complex. Sometimes, your sample will not show shear thinning or shear thickening behavior at low shear rates but will at high shear rates. </p> <p>Overall, there is just a lot to your sample that you may not know about until you actually test it. As a result, we recommend testing as much of a range as possible to ensure full knowledge of how your sample behaves. </p> </div> </div> </div></span> </div></div></div> </div> </div></div> </div> </div> </div> </div> </div> </div> <div class="row-fluid-wrapper row-depth-1 row-number-8 dnd-section dnd_area-row-4-force-full-width-section dnd_area-row-4-padding"> <div class="row-fluid "> <div class="span12 widget-span widget-type-custom_widget dnd-module" style="" data-widget-type="custom_widget" data-x="0" data-w="12"> <div id="hs_cos_wrapper_module_16990283345313" class="hs_cos_wrapper hs_cos_wrapper_widget hs_cos_wrapper_type_module" style="" data-hs-cos-general-type="widget" data-hs-cos-type="module"> <div class="pwr-sec-cta vanilla pwr-sec-cta--horizontal pwr-sec-cta--primary pwr--sec-padding-t-md pwr--sec-padding-b-md pwr--margin-t-0 pwr--margin-b-0 lazyload" tmp-data-aos="fade-in" tmp-data-aos-delay="50" style=""> <div id="shape-divider_module_16990283345313-1" class="pwr-shape-divider__shape pwr-shape-divider__shape--top "> <svg xmlns="http://www.w3.org/2000/svg" viewbox="0 0 1360 235" preserveaspectratio="none" class="pwr-shape-divider__svg"><path fill="#fff" opacity="1.0" d="M1268.562 113.395L0 235.995V0h1360c0 54.347-39.579 106.141-91.438 113.395z" fill-rule="evenodd" /></svg> </div> <div class="pwr-shape-divider__offset-wrapper"><div class="pwr-sec-cta--content page-center pwr--align-c pwr--relative"><div class="pwr-sec-cta__hor-text-wrapper"> <h3 class="pwr-sec-cta__title pwr-heading-style--default pwr-sec-cta__title--horizontal pwr--toc-ignore" tmp-data-aos="fade-in" tmp-data-aos-delay="50">Still have questions?</h3><span class="pwr-rich-text pwr-sec-cta__desc pwr-sec-cta__desc--horizontal" tmp-data-aos="fade-in" tmp-data-aos-delay="50"> <div data-widget-type="custom_widget" data-x="0" data-w="12">Contact us to talk with one of our rheology specialists. </div></span> </div><div class="pwr-sec-cta__cta-wrapper"> <div class="pwr-sec-cta__cta--right pwr-cta pwr-cta--regular-solid-primary-background " tmp-data-aos="fade-in" tmp-data-aos-delay="50"> <a class="pwr-cta_button " href="https://www.rheosense.com/contact-us?hsLang=en" target="_blank" rel="noopener" title="Button Contact Us">Contact Us</a> </div> </div></div> </div> </div></div> </div> </div> </div> </div> </div> </div> </div></div> </main><div data-global-resource-path="POWER THEME child/templates/partials/footer.html"><footer class="footer"><div class="container-fluid footer-top__container"> <div class="row-fluid-wrapper"> <div class="row-fluid"> <div class="span12 widget-span widget-type-cell " style="" data-widget-type="cell" data-x="0" data-w="12"> </div> </div> </div> </div> <div class="footer__container"><div id="hs_cos_wrapper_footer_page" class="hs_cos_wrapper hs_cos_wrapper_widget hs_cos_wrapper_type_module" style="" data-hs-cos-general-type="widget" data-hs-cos-type="module">  <div class="pwr-footer vanilla pwr-footer-reduced pwr--dark pwr--margin-t-0 pwr--margin-b-0 lazyload" style="background-color: rgba(58, 58, 59, 1.0); 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