Temtop Professional Formaldehyde Monitor Detector with HCHO/PM2.5/PM10/TVOC Accurate Testing Air Quality Detector

* The latest 9-IN-1 air quality detector measures PM2.5, PM10, particles, HCHO(formaldehyde), TVOC, AQI, temperature, humidity and histogram function. * The new histogram function can reflect the changes on PM2.5 directly for the latest 12 hours. * Temtop advanced third-generation laser particle sensor has a lifetime up to 20,000 hours. Combined with the unique particle swarm optimization algorithm, it makes particle measurement more accurate and stable. * The pre-calibrated electrochemical sensors will accurately capture formaldehyde molecules accompanied by the detection function covering a wide range of organic pollutants. * Large TFT screen and rich display make it clear and easy to read data, even with battery indicator light to help you check battery at any time. 24/7 US Technician Support via Email and Phone.