Overview

MQ-9 is a highly sensitive gas sensor to methane, propane and carbon monoxide. It has low cost, long life, simple drive circuit and suitable for different applications. This sensor is very useful for gas leakage detection. It can detect different gases that contain carbon monoxide and combustible gases with the use of sensitive material SnO₂.

Specifications

• Circuit Voltage: 5 V ± 0.1
• Heating resistance: 33 Ω ± 5%
• Heating consumption: Less than 340 mw
• Standard working temperature: -20 ^oC ± 2 ^oC
• Detecting range:
  • 20 to 2000 ppm CO
  • 500 to 10000 ppm CH₄
  • 500 to 10000 ppm LPG