Atmosphere NO2 detection system based on electrochemical sensor

The utility model discloses an atmosphere NO2 detection system based on electrochemical sensor belongs to the atmospheric environmental monitoring field, and the system includes sensor module, data acquisition and processing module, the visual module of human -computer interaction, sensor module includes NO2 four -electrode electrochemical sensor, temperature and humidity sensor, data acquisition and processing module include noiselike signal modulate circuit, DSP main control unit, the visual module of human -computer interaction includes labVIEW2015 platform, acousto -optic warning module, the utility model discloses it is more succinct, small -size, portable to compare traditional NO2 detecting system, can realize the high precision measurement to ppb magnitude low concentration NO2 in the atmosphere, can be accurate during the deduction low concentration electrochemical sensor drift and environment temperature and humidity change improved the credibility of testing result to the interference of NO2 testin