MQ-9 Carbon Monoxide Combustible Gas Detection Module
MQ-9 Carbon Monoxide Combustible Gas Detection Module

Description of product


The Analog CO/Combustible Gas Sensor(MQ9) module is useful for gas leakage detecting, it used the sensitive material 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 sensors 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 low temperature. MQ-9 gas sensor has high sensitivity to Carbon Monoxide, Methane and LPG. The sensor could be used to detect different gases contains CO and combustible gases, it is with low cost and suitable for different application.

Product Details

Minimum Order Quantity 1 Piece
Sensitivity High to Methane,Propene and CO
High Heater Temp 5V for Methane,Propane
Low Heater Temp 1.5V for CO
Interface type Analog
Concentration o 10-1000ppm CO o 100-10000ppm combustible gas
Size 40x20mm

Application Idea

  • Domestic gas leakage detector
  • Industrial gas detector
  • Portable gas detector



  • High sensitivity to Methane, Propane and CO
  • Long life and low cost
  • Simple drive circuit