PRE-CALIBRATED SENSORS. The pre-calibrated Dart electrochemical sensors will accurately capture formaldehyde molecules accompanied by the detection function covering a wide range of organic pollutants. ALL-IN-ONE RELIABLE AIR QUALITY MONITOR. The most advanced monitor measuring particulate matter (PM2.5 and PM10), formaldehyde (HCHO), VOC (airborne chemicals), humidity, temperature, and AQI. Tested by AQMD, R2 up to 0.999. DATA EXPORT AND HISTOGRAM. The histogram function can reflect the changes on PM2.5 directly for the latest 12 hours, helping you to keep track of the air. Export data to gain full visibility and analysis into 7 key indoor air factors. Memory allows at least 3 months of continuous data recording. EASY AND CLEAR. A large TFT screen and rich display make it clear and easy to read, even with a 6-level colorful health level indicator to help you know the air easily at a glance. INDUSTRIAL-GRADE AND LONG SENSOR LIFE. Temtop advanced industrial-grade laser particle sensor has a lifetime of up to 20,000 hours. Combined with the unique particle swarm optimization algorithm, it makes particle measurement more accurate and stable. › See more product details