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MQ7 CO Carbon Monoxide Coal Gas Sensor Module -SR044

MQ7 CO Carbon Monoxide Coal Gas Sensor Module -SR044


105 in stock

Regular price Rs. 95.00
Regular price Sale price Rs. 95.00
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  • Operating Voltage: DC 5V
  • Range: 10~1000 ppm
  • Characteristic Gas: 100 ppm Co
  • Sensitivity: ≥ 3%.


This Carbon Monoxide (CO) gas sensor detects the concentrations of CO in the air and outputs its reading as an analogue voltage. The sensor can measure concentrations of 10 to 10,000 ppm. The sensor can operate at temperatures from -10 to 50°C and consumes less than 150 mA at 5 V. This module provides both digital and analogue outputs. The threshold level for digital output can be easily adjusted using the preset on the board. The MQ-7 sensor module can be easily interfaced with microcontrollers, Arduino and etc.


Operating Voltage



10 ~ 1000 ppm

Characteristic Gas

100 ppm CO


≥ 3%.

Return Time

≤ 30 sec

Heating Resistance

± 31 Ω

Heating Current

≤ 180 mA

Heating Voltage

5.0V ± 2V / 1.5 ± 1V

Heating Power

approx. 350 mW

Ambient Temperature

-20 ~ + 50°C


≤ 95% RH

Oxygen Content



  • The analogue output voltage, the higher the concentration the higher the voltage.
  • The carbon monoxide detection with better sensitivity.
  • There are four screw holes for easy positioning.
  • With a long service life and reliable stability.
  • Rapid response and recovery characteristics.

Pin Definition:

  • Output
  • GND
  • VCC

Package Included:

1 x MQ7 CO Carbon Monoxide Coal Gas Sensor Module