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Henan Hanwei Electronics Co., Ltd www.hwsensor.com MQ-9 Semiconductor Sensor for CO/Combustible Gas Sensitive material of MQ-9 gas sensor is SnO2, which with lower conductivity in clean air. It make detection by method of cycle high and low temperature, and detect CO when low temperature (heated by 1.5V). The sensor’s conductivity is more higher along with the gas concentration rising. When high temperature (heated by 5.0V), it detects Methane, Propane etc combustible gas and cleans the other gases adsorbed under l

HANWEI ELETRONICS CO.,LTD MQ-9 http://www.hwsensor.com TECHNICAL DATA MQ-9 GAS SENSOR FEATURES * High sensitivity to carbon monoxide and CH4，LPG. * Stable and long life APPLICATION They are used in gas detecting equipment for carbon monoxide and CH4，LPG in family and industry or car. SPECIFICATIONS A. Standard work condition Symbol Vc VH (H) VH (L) Parameter name circuit voltage Heating voltage (high) Heating voltage (low) technical condition 5V±0.1 5V±0.1 1.4V±0.1 Remark AC or DC AC or DC AC or DC