Description:

The MQ-9 Carbon Monoxide & Combustible Gas Sensor Module can detect carbon monoxide and combustible gases in the surrounding air. The concentration of the gas is output as an analogue voltage reading. This sensor can detect concentrations between 100-1000ppm and is suitable for portable gas detectors and home safety automation systems.

The module requires two (3) different voltage inputs to operate. Heater voltage (HIGH) should be 5V (AC or DC), Heater voltage (LOW) needs 1.5V (AC or DC) and Loop Voltage should be less than 10VDC.

Please read the MQ9 datasheet for more info about the sensor.

Specifications:

• Gas Detected: Carbon Monoxide & Combustible Gas
• Concentration Sensitivity:
  • Carbon Monoxide: 10-1000ppm
  • Combustible Gas: 100-10000ppm
• Voltage Inputs:
  • Heater:
    • 5.0V±0.2V AC or DC（High）
    • 1.5V±0.1V AC or DC（Low）
  • Loop Voltage: ≤10V DC

Contents:

• 1 x MQ-9 Carbon Monoxide & Combustible Gas Sensor Module