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href='/jscripts/formantic-ui/dist/semantic.min.css?_=20191228.123631&type=css' rel='stylesheet'/> <h1>Air quality monitoring device & sensors research</h1> <div style='padding-left:10px;float:right;max-width: 50%; width:180px;color:#888;font-size: 66%;text-align: center;'> <img style='width:100%' src='/air/view/products/images/gaia-logo-large.png'> </div> <p> Air Quality monitoring is well known and established science which started back in the 80's. At that time, the technology was quite limited, and the solution used to quantify the air pollution complex, cumbersome and really expensive. </p> <div style='float:right;max-width: 50%; width:300px;color:#888;font-size: 66%;text-align: center;'> <img style='width:100%' src='/images/sensors/US7947503-Monitor-and-methods-for-characterizing-airborne-particulates.png'> Patent <a href='https://www.google.com/patents/US7947503'>US7947503</a>: Monitor and methods for characterizing airborne particulates </div> <p>Fortunately, now days, with the most recent and modern technologies, the solutions used for Air Quality monitoring are becoming not only more precise, but also faster at measuring. Devices are becoming smaller, and cost much more affordable than ever before. For instance, new technologies like the <i>Tapered element oscillating micro balance</i> (<a href='https://www.qld.gov.au/environment/pollution/monitoring/air-pollution/oscillating-microbalance/'>TOEM</a>) provide significant advantages over the traditional <i>Beta Attenuation Monitors</i> (<a href='https://www3.epa.gov/ttnamti1/files/2009conference/Hart.pdf'>BAM</a>) </p> <p> Even more recently, ultra-affordable sensors are starting to appear on the market - many of them linked to the <a href='https://en.wikipedia.org/wiki/Internet_of_things'>IOT</a> trend of sensing everything. While most of them are purely gimmick, and so definitely useless toys, some of them are starting to achieve performances comparable to professional monitors, at one hundred time less of cost of them. In order to asses the reliability of those sensors, the <a>Earth Sensing Labs</a> from the World Air Quality Index project is and has been conducting many Air Quality Sensor research and live-data experiments from many years. </p> <style type='text/css'> section { margin-top:20px; margin-bottom: 80px; } @media only screen and (max-width: 800px) { border-top: 1px solid #ccc; } @media only screen and (min-width: 800px) { section { padding-left: 20px; border-left: 3px solid #f8f8f8; } } </style><h2><p>Particle Sensors</p></h2><section> <p> The particle sensors can detect the amount of dust in the Air. While the first generation was just able to detect the amount of opacity, most recent sensors can now detect not PM<sub>2.5</sub> and PM<sub>10</sub> but also up to 7 different particle size (aka bins). </p> <center><div class='sensor-block-outer'><div class='sensor-block' onclick='window.location="/sensor/hpma115/"'><a href='/sensor/hpma115/'>HoneyWell HPMA 115<br></a><span class='sensor-box'><small style='line-height:1.1;'>Laser based PM<sub>2.5</sub>/PM<sub>10</sub> sensor</small><br><b>20USD</b> (130CN¥)<br></small><img src='/air/view/images/sensors/hpma115-front.png' class='sensor-img'></div></div><div class='sensor-block-outer'><div class='sensor-block' onclick='window.location="/sensor/pms5003-7003/"'><a href='/sensor/pms5003-7003/'>Plantower PMS 7003<br></a><span class='sensor-box'><small style='line-height:1.1;'>Laser based PM<sub>2.5</sub>/PM<sub>10</sub> sensor</small><br><b>20USD</b> (130CN¥)<br></small><img src='/air/view/images/sensors/pms7003-front.png' class='sensor-img'></div></div><div class='sensor-block-outer'><div class='sensor-block' onclick='window.location="/sensor/pms5003-7003/"'><a href='/sensor/pms5003-7003/'>Plantower PMS 5003<br></a><span class='sensor-box'><small style='line-height:1.1;'>Laser based PM<sub>2.5</sub>/PM<sub>10</sub> sensor</small><br><b>18USD</b> (120CN¥)<br></small><img src='/air/view/images/sensors/pms5003-front.png' class='sensor-img'></div></div><div class='sensor-block-outer'><div class='sensor-block' onclick='window.location="/sensor/pms3003/"'><a href='/sensor/pms3003/'>Plantower PMS 3003<br></a><span class='sensor-box'><small style='line-height:1.1;'>Laser based PM<sub>2.5</sub>/PM<sub>10</sub> sensor</small><br><b>14USD</b> (90CN¥)<br></small><img src='/air/view/images/sensors/pms3003-large.png' class='sensor-img'></div></div><div class='sensor-block-outer'><div class='sensor-block' onclick='window.location="/sensor/pms1003/"'><a href='/sensor/pms1003/'>Plantower PMS 1003<br></a><span class='sensor-box'><small style='line-height:1.1;'>Laser based PM<sub>2.5</sub>/PM<sub>10</sub> sensor</small><br><b>14USD</b> (90CN¥)<br></small><img src='/air/view/images/sensors/pms1003-large.png' class='sensor-img'></div></div><div class='sensor-block-outer'><div class='sensor-block' ><div class='comming-soon-out'><div class='comming-soon'>Comming Soon</div></div>Plantower PMS A003<br><span class='sensor-box'><small style='line-height:1.1;'>Laser based PM<sub>2.5</sub>/PM<sub>10</sub> sensor</small><br><b>24USD</b> (160CN¥)<br></small><img src='/air/view/images/sensors/pms-a003-front.png' class='sensor-img'></div></div><div class='sensor-block-outer'><div class='sensor-block' onclick='window.location="/sensor/sds011/"'><a href='/sensor/sds011/'>Novafitness SD011<br></a><span class='sensor-box'><small style='line-height:1.1;'>Laser based PM<sub>2.5</sub>/PM<sub>10</sub> sensor</small><br><b>23USD</b> (150CN¥)<br></small><img src='/air/view/images/sensors/sds011.png' class='sensor-img'></div></div><div class='sensor-block-outer'><div class='sensor-block' ><div class='comming-soon-out'><div class='comming-soon'>Comming Soon</div></div>Novafitness SD018<br><span class='sensor-box'><small style='line-height:1.1;'>Laser based PM<sub>2.5</sub>/PM<sub>10</sub> sensor</small><br><b>19USD</b> (128CN¥)<br></small><img src='/air/view/images/sensors/sds018-front.png' class='sensor-img'></div></div><div class='sensor-block-outer'><div class='sensor-block' onclick='window.location="/sensor/sds021/"'><a href='/sensor/sds021/'>Novafitness SD021<br></a><span class='sensor-box'><small style='line-height:1.1;'>Laser based PM<sub>2.5</sub>/PM<sub>10</sub> sensor</small><br><b>23USD</b> (155CN¥)<br></small><img src='/air/view/images/sensors/sds021.png' class='sensor-img'></div></div><div class='sensor-block-outer'><div class='sensor-block' onclick='window.location="/sensor/yt001/"'><a href='/sensor/yt001/'>Yuntong YT-001<br></a><span class='sensor-box'><small style='line-height:1.1;'>Laser based PM<sub>2.5</sub>/PM<sub>10</sub> sensor</small><br><b>20USD</b> (130CN¥)<br></small><img src='/air/view/images/sensors/yt-001.font.png' class='sensor-img'></div></div><div class='sensor-block-outer'><div class='sensor-block' ><div class='comming-soon-out'><div class='comming-soon'>Comming Soon</div></div>Sharp DN7C3JA001<br><span class='sensor-box'><small style='line-height:1.1;'>Virtual Impactor for Sharp<br>GP2Y1051AU0F</small><br><b>20USD</b> (135CN¥)<br></small><img src='/air/view/images/sensors/Sharp-DN7C3JA001.png' class='sensor-img'></div></div><div class='sensor-block-outer'><div class='sensor-block' onclick='window.location="/sensor/shinyei/"'><a href='/sensor/shinyei/'>Shinyei PPD42NS<br></a><span class='sensor-box'><small style='line-height:1.1;'>LPO Optical PM sensor</small><br><b>5USD</b> (35CN¥)<br></small><img src='/air/view/images/sensors/Shinyei.png' class='sensor-img'></div></div><div class='sensor-block-outer'><div class='sensor-block' onclick='window.location="/sensor/shinyei/"'><a href='/sensor/shinyei/'>Samyoung DSM501<br></a><span class='sensor-box'><small style='line-height:1.1;'>LPO Optical PM sensor</small><br><b>4USD</b> (24CN¥)<br></small><img src='/air/view/images/sensors/Samyoung.png' class='sensor-img'></div></div><div class='sensor-block-outer'><div class='sensor-block' onclick='window.location="/sensor/shinyei-plusplus/"'><a href='/sensor/shinyei-plusplus/'>Modified Shinyei PPD42NS<br></a><span class='sensor-box'><small style='line-height:1.1;'>Analog Optical PM sensor</small><br><b>5USD</b> (35CN¥)<br></small><img src='/air/view/images/sensors/Shinyei-moded-small.png' class='sensor-img'></div></div><div class='sensor-block-outer'><div class='sensor-block' onclick='window.location="/sensor/beijing/sanlitun/"'><a href='/sensor/beijing/sanlitun/'>Dylos DC1100<br></a><span class='sensor-box'><small style='line-height:1.1;'>Laser based PM<sub>2.5</sub>/PM<sub>10</sub><br>integrated monitor</small><br><b>300USD</b> (2000CN¥)<br></small><img src='/air/view/images/sensors/Dylos-DC1100pro.png' class='sensor-img'></div></div><div class='sensor-block-outer'><div class='sensor-block' ><div class='comming-soon-out'><div class='comming-soon'>Comming Soon</div></div>Alphasense OPC-N2<br><span class='sensor-box'><small style='line-height:1.1;'>Laser based PM<sub>2.5</sub>/PM<sub>10</sub> sensor</small><br><b>500USD</b> (3333CN¥)<br></small><img src='/air/view/images/sensors/Alphasense-OPCN2.2.png' class='sensor-img'></div></div></center> </section><h2><p>Gas Sensors</p></h2><section> <p> On the opposite of particle sensors, the gas sensor can detect and count the type of <i>particle</i> present in the air, such as for instance Ozone (O<sub>3</sub>), Nitrogen Dioxide (NO<sub>2</sub>), Sulfur Dioxide (SO<sub>2</sub>), ... </p> <center><div class='sensor-block-outer'><div class='sensor-block' onclick='window.location="/sensor/gas/"'><a href='/sensor/gas/'>MQ 131<br></a><span class='sensor-box'><small style='line-height:1.1;'>Ozone Electro-Chemical sensor</small><br><b>60CNY</b><br></small><img src='/air/view/images/sensors/ozone-mq131-front.png' class='sensor-img'></div></div><div class='sensor-block-outer'><div class='sensor-block' onclick='window.location="/sensor/gas/"'><a href='/sensor/gas/'>Specs<br></a><span class='sensor-box'><small style='line-height:1.1;'>Ozone Electro-Chemical sensor</small><br><b>57USD</b> (380 CN¥)<br></small><img src='/air/view/images/sensors/Ozone-SpecsSensor-front.png' class='sensor-img'></div></div><div class='sensor-block-outer'><div class='sensor-block' onclick='window.location="/sensor/gas/"'><a href='/sensor/gas/'>SGX MiCs 2614<br></a><span class='sensor-box'><small style='line-height:1.1;'>Ozone MEMS sensor</small><br><b>18USD</b> (120 CN¥)<br></small><img src='/air/view/images/sensors/ozone-mics-2614.png' class='sensor-img'></div></div><div class='sensor-block-outer'><div class='sensor-block' onclick='window.location="/sensor/gas/"'><a href='/sensor/gas/'>SGX MiCs 2714<br></a><span class='sensor-box'><small style='line-height:1.1;'>NO<sub>2</sub> MEMS sensor</small><br><b>23USD</b> (150 CN¥)<br></small><img src='/air/view/images/sensors/ozone-mics-2614.png' class='sensor-img'></div></div><div class='sensor-block-outer'><div class='sensor-block' onclick='window.location="/sensor/gas/"'><a href='/sensor/gas/'>Alphasense NO2 B43F<br></a><span class='sensor-box'><small style='line-height:1.1;'>NO<sub>2</sub> Electro-Chemical sensor</small><br><b>90USD</b> (600 CN¥)<br></small><img src='/air/view/images/sensors/alphasense-no2-a1-front.png' class='sensor-img'></div></div><div class='sensor-block-outer'><div class='sensor-block' onclick='window.location="/sensor/gas/"'><a href='/sensor/gas/'>MQ 9<br></a><span class='sensor-box'><small style='line-height:1.1;'>Carbon Monoxyde Electro-Chemical sensor</small><br><b>5CNY</b><br></small><img src='/air/view/images/sensors/ozone-mq131-front.png' class='sensor-img'></div></div></center> </section><h2><p>Notes</p></h2><section> <ul> <li> Note1: The USD/CNY conversion rate is based on 1 CNY = 0.15 USD. The price are based on direct purchase from the vendors without shipping cost. </li> <li> Note2: The Dylos monitor does not really belong to the PM sensor category since it is a completely integrated and standalone monitoring equipment, much more expensive than any other sensor, but it is listed here for historical reason. </li> <li> Note 3: The Alpha Sense OPCN2 is expensive, and the the price you pay is for the traceable calibration (done using Polystyrene Spherical Latex Particles). Otherwise, from a technology side, it does not include anything better than what the $20 sensors can do, except from an IC. </li> <li> Note4: There are many scientific article on low-cost sensor. See the one from NCAS and WACL for an excellent and brief <a target=_ href='http://www.londonair.org.uk/london/asp/LAQNSeminar/pdf/June2016/Pete_Edwards_low_cost_chemical_sensor.pdf'> overview</a> on the evaluation of low cost chemical sensors for air pollution measurement. </li> </ul> </section><h2><p>Last 5 days PM<sub>2.5</sub> comparative measurement</p></h2><section> The graph "BAM PM<sub>2.5</sub>" is the reference measurement from a professional <a href='https://en.wikipedia.org/wiki/Beta_attenuation_monitoring'>BAM</a> monitor. A <a href='https://en.wikipedia.org/wiki/Local_regression'>loess</a> smoothing is applied to all the other graphs in order to minimize the noise. You can move your mouse over the graph labels to see the actual output vs. the averaged values. <br> <br> <div style='width:99%;' id='sensorviewwidth'> <div id='gpm25'> </div> <br> <br> <div id='sensor-realtime-update-status'></div> <br> <br> </div> <style type="text/css"> a.sensorlink { color: white; text-decoration: none; } a.sensorlink:link { text-decoration: none; } a.sensorlink:visited { text-decoration: none; } a.sensorlink:hover { text-decoration: underline; } </style> <script> function initGraphs() { try { var ndays = 5; var avg = null; var avg1 = null; var circleSize = 0; var height = 300; var sensors = [{ id: "dylos-outdoor-pm25", name: "Dylos", color: "orange", url: "/sensor/beijing/sanlitun/", pol: "pm25" }, { id: "china.beijing.sanlitun.pms1003.outdoor.x1", pol: "pm2.5-mg", name: "PMS 1003", color: "purple", url: "/sensor/pms1003/" }, { id: "china.beijing.sanlitun.pms3003.outdoor.x1", pol: "pm2.5-mg", name: "PMS 3003", color: "purple", url: "/sensor/pms3003/" }, { id: "china.beijing.sanlitun.pms5003.outdoor.x1", pol: "pm2.5-mg", name: "PMS 5003", color: "grey", url: "/sensor/pms5003-7003/" }, { id: "china.beijing.sanlitun.pms7003.outdoor.x1", pol: "pm2.5-mg", name: "PMS 7003", color: "violet", url: "/sensor/pms5003-7003/" }, { id: "china.beijing.sanlitun.sds011.outdoor.x1", pol: "pm2.5-mg", name: "SDS 011 (new)", color: "teal", url: "/sensor/sds011/", div: 10000 }, { id: "china.beijing.sanlitun.sds011.outdoor.x2", pol: "pm2.5-mg", name: "SDS 011 (old)", color: "blue", url: "/sensor/sds011/", div: 10000 }, { id: "china.beijing.sanlitun.sds021.outdoor.x1", pol: "pm2.5-mg", name: "SDS 021", color: "pink", url: "/sensor/sds021/", div: 10000 }, { id: "china.beijing.sanlitun.hpma115so.outdoor.x1", pol: "pm2.5-mg", color: "orange", name: "HPMA 115SO", url: "/sensor/hpma115/" }, { id: "bam-pm25", name: "BAM PM2.5", color: "red", url: "/city/beijing/chaoyangnongzhanguan/" }, /* {id:"shinyei-outdoor-pm25",name:"Shinyei",color:"grey",url:"/sensor/shinyei/"}, {id:"pms5003-outdoor-pm25",name:"PMS 5003",color:"violet",url:"/sensor/pms5003/"}, {id:"yt001-outdoor-pm25",name:"YT 001",color:"grey",url:"/sensor/yt001/"}, {id:"bam-pm25",name:"BAM (reference value)",color:"red"} */ ]; showSensors(d3.select("#gpm25"), sensors, { ndays: ndays, autoscale: true }); showSensorStatus(d3.select("#sensor-realtime-update-status"), sensors, ["pm25"]) } catch (e) { $('#status').html("Error: " + e); } } function initPage() { initGraphs(); } </script></section> <center><br>-<svg xmlns="http://www.w3.org/2000/svg" width="28" height="28" version="1" viewBox="0 0 26 26" enable-background="new 0 0 26 26"> <path d="M 15.65625 -0.03125 C 14.280846 -0.03760636 12.828752 0.09254274 11.3125 0.40625 C 8.28651 1.0323169 5.7746616 2.1709106 3.96875 3.59375 C 2.3885774 4.8387345 1.3097647 6.3321654 1.0625 7.96875 A 1.0001 1.0001 0 0 0 1 8.40625 C 1 8.4709766 0.99753847 8.5296394 1 8.59375 C 0.99939321 8.6245955 1 8.6565744 1 8.6875 C 1.0067678 8.8049913 1.0164368 8.9159604 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of all air quality sensors, check the <a class='citysync' href='/sensor/'>Sensor Overview</a> page</div><br><div style='height:1px;background-color:#aaaaaa;width:220px;margin-top:5px;'></div><div id="disqus_thread_title" onclick="showDisqus();" style="margin:20px 5px;cursor:pointer;color:#888;"><svg fill="#888888" style="float:left;margin-right:5px;" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" viewBox="0 0 511.999 511.999" width=32 heigh=32 xml:space="preserve"> <path d="M372.29,50.758H28.831C12.933,50.758,0,63.691,0,79.588v206.056c0,15.897,12.933,28.831,28.831,28.831h22.271v76.71 c0,4.884,2.942,9.289,7.456,11.159c1.494,0.62,3.064,0.92,4.62,0.92c3.144,0,6.232-1.228,8.543-3.538l85.251-85.25h17.104 c6.671,0,12.078-5.407,12.078-12.078c0-6.672-5.409-12.079-12.078-12.079c0,0-22.69,0.016-22.927,0.04 c-2.812,0.191-5.572,1.349-7.722,3.498l-68.169,68.169c0,0-0.021-60.392-0.06-60.705c-0.545-6.166-5.717-11.002-12.024-11.002 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d="M362.964,285.53c-6.667,0-12.078,5.411-12.078,12.078c0,6.667,5.411,12.078,12.078,12.078 c6.668,0,12.078-5.411,12.078-12.078C375.042,290.941,369.631,285.53,362.964,285.53z"/> <path d="M310.472,130.611c0,0-219.822,0-219.822,0c-6.67,0-12.078,5.407-12.078,12.078s5.409,12.078,12.078,12.078h219.822 c6.67,0,12.078-5.407,12.078-12.078S317.142,130.611,310.472,130.611z"/> <path d="M174.075,210.465H90.65c-6.67,0-12.078,5.407-12.078,12.078c0,6.671,5.409,12.078,12.078,12.078h83.425 c6.671,0,12.078-5.407,12.078-12.078S180.745,210.465,174.075,210.465z"/> <path d="M306.837,285.53c-6.666,0-12.078,5.411-12.078,12.078c0,6.667,5.412,12.078,12.078,12.078 c6.668,0,12.078-5.411,12.078-12.078C318.915,290.941,313.505,285.53,306.837,285.53z"/> <path d="M419.079,285.53c-6.667,0-12.078,5.411-12.078,12.078c0,6.667,5.411,12.078,12.078,12.078 c6.668,0,12.078-5.411,12.078-12.078C431.157,290.941,425.746,285.53,419.079,285.53z"/> </svg> Read or publish comments (they rely on Disqus)</div><div id="disqus_thread" ></div> <script type="text/javascript"> function showDisqus() { document.getElementById("disqus_thread_title").style.display="none"; var disqus_identifier = "httpaqicnorgsensor"; var disqus_url = "http:\/\/aqicn.org\/sensor\/"; var disqus_title = "Sensing the Air Quality: Research on Air Quality Sensors"; var dsq = document.createElement("script"); dsq.type = "text/javascript"; dsq.async = true; dsq.src = "//aqicn.disqus.com/embed.js"; (document.getElementsByTagName("head")[0] || document.getElementsByTagName("body")[0]).appendChild(dsq); }; </script> </div></div></div><a name="infoaqi"></a><div class='h1section h1section-divider'><div class='h1section-rainbow'><div></div><div></div><div></div><div></div><div></div></div><h1><div id='h1header3' style='padding:2px;font-family:"Noto Serif",Cambria,"Palatino Linotype","Book Antiqua","URW Palladio L",serif;;'>O měření kvality ovzduší a znečištění:</div></h1></div><script type='text/javascript'> ; if (!isMobileUA) { fitLine('#h1header3',.88,{maxfs:45}); }; </script><div class='whitebody' style='font-family:"Noto Serif",Cambria,"Palatino Linotype","Book Antiqua","URW Palladio L",serif;'><div class='section-outer'><div class='section-content' > <center>O úrovních kvality ovzduší<br> <br> <style type="text/css"> #legend-full table.infoaqitable { line-height: 1.5; background-color: white; max-width: 1000px; width: 95%; margin: 0px; border: 1px solid black; cursor: pointer; } #legend-full table.infoaqitable td { padding: 5px; font-size: 15px; text-shadow: none; } #legend-full .aqiwtxt { color: #ffffff; } #legend-full .aqibtxt { color: #000000; } @media only screen and (max-width: 800px) { #legend-full table.infoaqitable { width: 98%; } } @media only screen and (max-width: 800px) { #legend-full table.infoaqitable td { display: block; } #legend-full table.infoaqitable td:nth-child(1) { display: inline-block; font-size: 1.2em; } #legend-full table.infoaqitable td:nth-child(2) { display: inline-block; font-weight: 800; font-size: 1.2em; } } </style> <div id='legend-full' onclick='window.location="/scale/"'> <table class="infoaqitable"> <thead> <tr> <td>- <td >Hodnoty indexu kvality ovzduší (AQI).<td>Úrovně obav o zdraví</td></tr> </thead> <tr style="background-color:#009966;"> <td class='aqiwtxt' nowrap="true">0 - 50</td> <td class='aqiwtxt'>Dobrý</td> <td class='aqiwtxt'>Kvalita ovzduší je považována za uspokojivou a znečištění ovzduší představuje malé nebo žádné riziko</td></tr> <tr style="background-color:#ffde33" class='aqibtxt'> <td class='aqibtxt' nowrap="true">51 -100</td> <td class='aqibtxt'>Mírný</td> <td class='aqibtxt'>Kvalita ovzduší je přijatelná; u některých znečišťujících látek však může existovat mírný zdravotní problém u velmi malého počtu lidí, kteří jsou neobvykle citliví na znečištění ovzduší.</td></tr> <tr style="background-color:#ff9933;"> <td class='aqibtxt' nowrap="true">101-150</td> <td class='aqibtxt'>Nezdravé pro citlivé skupiny</td> <td class='aqibtxt'>Členové citlivých skupin mohou mít účinky na zdraví. Obecná veřejnost pravděpodobně nebude zasažena.</td></tr> <tr style="background-color:#cc0033;"> <td class='aqiwtxt' nowrap="true">151-200</td> <td class='aqiwtxt'>Nezdravý</td> <td class='aqiwtxt'>Každý může začít projevovat účinky na zdraví. členové citlivých skupin mohou mít vážnější účinky na zdraví</td></tr> <tr style="background-color:#660099;"> <td class='aqiwtxt' nowrap="true">201-300</td> <td class='aqiwtxt'>Velmi Nezdravé</td> <td class='aqiwtxt'>Zdravotní varování při havarijních podmínkách. Celá populace je pravděpodobněji postižena.</td></tr> <tr style="background-color:#7e0023;"> <td class='aqiwtxt' nowrap="true">300+</td> <td class='aqiwtxt'>Nebezpečný</td> <td class='aqiwtxt'>Zdravotní upozornění: každý může mít vážnější zdravotní účinky</td></tr> </table> </div><br>Chcete-li se dozvědět více o kvalitě ovzduší a znečištění, podívejte se na <a href='http://en.wikipedia.org/wiki/Air_quality'>téma Kvalita ovzduší na wikipedii</a> nebo <a href='http://www.airnow.gov/index.cfm?action=aqibasics.aqi'>na airnow průvodce Kvalita ovzduší a vaše zdraví</a> .<br><br>Velmi užitečné zdravotní rady pekingského lékaře Richarda Saint Cyr MD najdete na blogu <a href='http://www.myhealthbeijing.com/'>www.myhealthbeijing.com</a> .<br><br></center></div></div></div> <center> <br>  <ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-0281575029452656" data-ad-slot="2455076269" data-ad-format="auto"></ins> <script>(adsbygoogle = window.adsbygoogle || []).push({});</script> <style type='text/css'> .usage-notice { line-height:1.5; max-width:95%; width:1000px; margin-top:10px; padding:5px; font-size: 15px; background-color:#ffffff; text-shadow: 1px 1px 1px white; -webkit-box-shadow: 1px 1px 8px -3px rgba(0,0,0,0.3); } </style> <div class="textshadowwhite usage-notice" style=''> <b>Upozornění na použití</b>: Veškeré údaje o kvalitě ovzduší jsou v době zveřejnění neplatné a vzhledem k zajištění kvality mohou být tyto údaje kdykoli změněny bez upozornění. Projekt <a href='https://aqicn.org'> Světový index kvality ovzduší </a> vynaložil veškeré přiměřené schopnosti a péči při sestavování obsahu těchto informací a za žádných okolností <a href='https://aqicn.org'> Projektový tým Světového indexu kvality ovzduší </a> nebo jeho zástupci nesou odpovědnost za smluvní, delikt nebo jinou odpovědnost za jakoukoliv ztrátu, zranění nebo škodu vzniklou přímo nebo nepřímo z poskytování těchto údajů.</div> <br> <br> <br> </center> <style type="text/css"> @media print { #fixed-menubar, #footer-overlay { display: none } } .footer { background: #138fcc; background-attachment: fixed; background-image: url("https://aqicn.org/images-static/bluesky-banner-panoramic-dark.jpg"); background-position: top center, bottom center; background-size: auto 100%; position: relative; text-align: center; font-weight: normal; margin: 0 auto; color: white; width: 100%; font-family: "Noto Serif", Cambria, "Palatino Linotype", "Book Antiqua", "URW Palladio L", serif; } 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height: 0; border: 7px solid transparent;top:0px;border-top: 7px solid #fff;position:relative;;margin-left:100px;'></div></div> </div> <script> function CSettingsMenu() { var self=this; var isInit = false; var timeout = null; var isPopup = false; this.show = function() { log("show!"); if (isPopup) { this.close(); return; } isPopup = true; $("#settingsdiv-arrow").hide(); $("#settingsdiv").show(); var pos = $("#footer-settings-img").offset(); $("#settingsdiv-outer").css({ left: "0px", width: "100%", bottom: "30px" }); $("#settingsdiv").css({ width: "100%", textAlign: "center", boxSizing: "border-box" }); }; this.close = function() { log("close!"); $("#settingsdiv").hide(); isPopup = false; }; this.onmouseover = function() { if (isPopup) return; if (!footer || !footer.isFloating()) return; if (getWindowWidth()<800) return; if (!isInit) { $('#settingsdiv-outer').show() .mouseleave(function(){ self.onmouseout(); }) .mouseenter(function(){ self.onmouseover(); }); display("temp"); isInit = true; 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Cel\u00e1 populace je pravd\u011bpodobn\u011bji posti\u017eena.");aqi18n.register('aqi-level-200-300',"Velmi Nezdrav\u00e9");aqi18n.register('aqi-level-200-300-html',"<div style='font-size:80%'>Velmi Nezdrav\u00e9<\/div>");aqi18n.register('aqi-implication-300-500',"Zdravotn\u00ed upozorn\u011bn\u00ed: ka\u017ed\u00fd m\u016f\u017ee m\u00edt v\u00e1\u017en\u011bj\u0161\u00ed zdravotn\u00ed \u00fa\u010dinky");aqi18n.register('aqi-level-300-500',"Nebezpe\u010dn\u00fd");aqi18n.register('updated',"Updated"); </script> <script type="text/javascript"> ["initFooter","preInitPage","initTime"].forEach(function(f){ if (window[f]) { try { window[f](); } catch (e) { loge("error in "+f,e); }} }); </script> <script src='/jscripts/moment/bundle.min.js?_=20200103.150752&type=script'></script> <script src='https://aqicn.org/air-cache/tingle/0.15.1/tingle.min.js?_=20191109.130307' type='text/javascript'></script> <script type="text/javascript"> document.addEventListener("DOMContentLoaded", function() { ["Page","HeadSearch","Search","Notify","Geolocate","AqiForecast","Download","Sharing","Page2"].forEach(function(f){ f = "init"+f; if (window[f]) { try { window[f](); } catch (e) { loge ("error in "+f,e,e.stack);}; } }); if (typeof ntfOnInit != "undefined") ntfOnInit(); }); </script> <style type="text/css"> .uv-icon.uv-top-right { position:absolute!important;top:38px!important;z-index: 1!important; } .uv-icon.uv-bottom-right { bottom:42px!important;} ._hj-f5b2a1eb-9b07_widget { z-index: 0!important; } #uvTab { z-index: 100!important; } .uv-icon { z-index: 100; } </style> <script type="text/javascript"> (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){ (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o), m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m) })(window,document,'script','https://www.google-analytics.com/analytics.js','ga'); ga('create', 'UA-28507883-1', 'auto'); ga('send', 'pageview'); try { var images = document.querySelectorAll('.async-img'); var config = { rootMargin: '50px 0px', threshold: 0.01}; function preloadImage(img) { img.src = img.dataset.src; } function onIntersection(entries) { entries.forEach(function(entry) { if (entry.intersectionRatio > 0) { observer.unobserve(entry.target); preloadImage(entry.target); } }) } var observer = new IntersectionObserver(onIntersection, config); images.forEach(function(image){observer.observe(image)}); } catch (e) {} </script>  </body> </html>