The air quality detector is a new type of air quality detector based on the modular design theory. Provide up to 7 daily air quality reference materials. The built-in range temperature reading calibration technology allows the user to manually adjust the reading value within the range of -10 to 35 degrees Celsius. The technology-built-in formaldehyde amplifier module suppresses the long-term use drift of the formaldehyde sensor and provides 4-second response data. Fully open design, smooth internal air exchange, sensitive temperature and humidity detection, using built-in probe and compensation method to calculate temperature, more accurate. Superior in testing speed and accuracy. The whole machine is equipped with 18650 lithium battery, which is easy to replace and purchase. The standard version can provide 6 hours of battery life. Through the interface connection, it can guarantee 7*24 hours of long-term stable testing. Mainly used for home air environment testing. Depending on different user requirements, the basic functions and motherboards are the same., Manufacturer: DRAUXI