- Good sensitivity to CO/Combustible Gas
- High sensitivity to Methane, Propane, and CO
- Long life and low cost
- Simple drive circuit
- Input voltage: DC 5±0.2V
- Current Consumption: 150mA
This MQ-9 Carbon Monoxide, Methane, and LPG Gas Sensor Module can be used to sense Carbon Monoxide and Methane Gas. Sensitive material used in MQ-9 gas sensor is SnO2, which has lower conductivity in clean air.
It makes detection by the method of cycle high and low temperature, and detect CO when the temperature is low (heated by 1.5V). The sensor’s conductivity gets 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 low temperature.