brwissen a16 air quality monitor indoor pollution tester data record for pm1.0 pm2.5 pm10 particulate matter fine dust meter tvoc vocs hcho analyzer formaldehyde air gas detector desktop brwissen <b>product highlights:</b><br> 1. 5-in-1 function -can test pm1.0, pm2.5, pm10, tvoc, hcho(formaldehyde); 3 display modes: numerical display / curve display / particle number display, click mode switch key to switch it. press and hold the set/confirm button for 3 seconds to enter settings page. <br><br> 2. high accuracy -laser particle sensor to accurately distinguish 0.3 fine particulate matter; electrochemical sensor to resolve 0.001mg/m3 of free formaldehyde molecules; semiconductor tvoc total volatile organic compounds sensor can measure a variety of chemistry pollution such as benzene, toluene. <br><br> 3. auto-sensitivity -automatically turns off the screen according to the ambient brightness; store and export data records, draw a 24-hour real-time data curve, with aqi air quality condition assessment and buzzer alarm. <br><br> 4. inspection of air equipment purification efficiency - br-a air quality analyzer can check the air quality to evaluate the purification efficiency of the filter of your purifier and ventilator and to remind you to replace the filter element. <br><br> <b>instructions for use:</b><br> 1. click mode switch key enter the 6-channel particle number interface<br> <br> 2. tf memory card can record test data of pm2.5, pm10, tvoc, hcho<br> <br> 3. auto-sensitivity and alarm functions can be turned on or off in the setting interface<br> <br> 4. after turn on the detector, sensor warm-up time is 1-3 minutes<br> <br> 5. for initial use, place the device in a well-ventilated environment for 8 hours before use<br><br> <b>measurement indexes:</b><br> pm1.0/pm2.5/pm10: light scattering test<br> range: 0-999ug/m3<br> resolution: 1.0ug/m3<br> <br> formaldehyde: electrochemical test<br> range: 0-1.000mg/m3<br> resolution: 0.001mg/m3<br> <br> tvoc: semiconductor sensor <br> range: 0-9.999mg/m3<br> resolution: 0.001mg/m3<br><br> <b>packing list:</b><br> 1 x air quality monitor unit(with 128m tf card)<br> 1 x usb cable<br> 1 x product manual<br>