NO2 Handheld Pump Suction Nitrogen Dioxide Detector Performance Features of Nitrogen Dioxide Concentration Detector: Liquid crystal dot matrix display technology, which can display gas type, gas unit, gas concentration value, measurement Max value, local time, etc. With self-calibration function and zero calibration function, the gas monitoring is accurate and reliable One-key factory reset function, can avoid the trouble of misoperation With temperature and pressure compensation, it can realize the compensation of gas concentration under different temperature and pressure environments