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MQ7 Gas Sensor - Carbon Monoxide Sensor


MQ-7 sensor has a high sensitivity to carbon monoxide. It is low cost and suitable for various applications.

Using high-quality dual-panel design, with a power indicator and TTL signal output instructions, With a the DOUT switch signal (TTL) output, and AO analog signal output; TTL output valid signal is low level (When the low level output signal lights, it can be connected directly to the microcontroller or relay module).

TTL output signal can be connected directly to a microcontroller IO port or connect to the relay module, potentiometer is used to adjust the output level transition threshold.


  • Wide detecting scope.
  • Stable and long life.
  • Fast response and High sensitivity.
  • Analog and Digital Outputs.
  • Trigger Level configuration Potentiometer.
  • Size: 32mm x 22mm x 27mm.
  • Operating voltage: DC 5V.
  • Analog Output (AO): 0~5V analog output voltage (higher voltage means higher concentration).
  • Digital Outout (DO): 0V or 5V output.
  • Preheat Duration: 20s.

Availability: In stock

In Stock

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