Seeed Studio Grove Gas Sensor - MQ-9

A Grove MQ-9 gas sensor from Seeed Studio. This sensor communicates by outputting an analog signal to the SIG pin. The sensitivity/signal output voltage of the gas sensor can be adjusted with the built-in potentiometer. This sensor cannot measure an exact concentration, but it can detect concentration differences over time.

Specifications:

• Supply voltage: 3.3 - 5V DC
• Signal voltage: 3.3 - 5V (adjustable with potentiometer*)
• Sensor: MQ-9
• Gas detection:
  • LPG
  • Methane (CH4)
  • Carbon monoxide (CO)
• Measuring range:
  • CO: 10 - 1000ppm
  • CH4: 100 - 10000ppm
  • LPG: 100 - 10000ppm
• Maximum power heating element: 340mW
• Connector: Grove
• Dimensions: See images

Package contents:

• 1x Seeed Studio Grove Gas Sensor - MQ-9
• 1x Grove cable

See the following page for more information and examples: Seeed Studio Grove Gas Sensor MQ-9

*Note: The module has a built-in boost converter with as a result that the signal output voltage can be a maximum of 5V. Therefore, when using a 3.3V microcontroller, set the potentiometer in such a way that the signal voltage always remains below 3.3V.