Overview
The air quality detector adopts imported sensors, which can detect formaldehyde, PM2.5, TVOC and temperature and humidity at the same time. It is a four-in-one air quality detector. Through the original imported sensor inside, it can accurately measure the concentration of pollutants, and calculate the air quality index AQI, and alarm when the concentration exceeds the standard. The principle of the air quality detector is to detect the signal of the front-end formaldehyde sensor, PM2.5 sensor, TVOC sensor and temperature and humidity sensor, amplify the weak signal of the sensor through the operational amplifier, and remove the noise interference through the filter circuit, and then collect it through AD, and use the 32-bit high-precision CPU processing and calculation. It is then converted into the pollutant concentration value and displayed on the LCD screen.
