The Air quality sensor developed and produced by Shenzhen Wanyi Technology Co., Ltd. is specially designed to meet the requirements of integrated gas concentration monitoring for mobile devices. The optional indicators are as follows: CO, SO2, NO2 and O3, PM2.5 and PM10, TSP, etc., using fully sealed straight through gas sampling method, by detecting the gas by suction unit. The Air quality sensor mainly solves the problems of various kinds of gas detection, incompatible sensors of various varieties, complicated production calibration, and core component replacement limitation, etc. Easy to operate, accurate measurement, reliable work; Its light and small size, the gas sensor can be replaced according to specific needs, with temperature compensation, no need to calibrate again after factory use.