Milesight AM319 9-in-1 wireless IAQ Sensor - LorawanMilesight AM319 Environmental, CO2, PM and HCHO sensor with display Milesight AM319 CO2, Formaldehyde and Particulates Sensor complete with easy to read E ink Display. Milesight's AM319 868M HCHO is a 9 in 1 multifunction device, featuring temperature, humidity and pressure, PIR, TVOC, light level, CO2, Formaldehyde and Particulate sensors, all in one clever package. The sensor features a large e ink display, for continuous feedback to users, is