Your position: Home / Sensors / Gas Sensor

Keyestudio MQ-7 Carbon Monoxide CO Gas Sensor Detection Module for arduino

(904 available)
Shipping Cost:
Estimated Delivery Time:
Please select the country you want to ship from
Please select the information you wantX
  • Description
  • Features
  • Documents
  • Reviews

The gas sensitive material used in MQ-7 gas sensor is SnO2, which is of lower electrical conductivity in clean air. It detects carbon monoxide with low temperature (heated by 1.5V) through high-low temperature cycles. The electrical conductivity of the sensor increases with the increase of the carbon monoxide concentration in the air. The change of electrical conductivity can be converted to the output signal corresponding to that of the gas concentration by using a simple circuit.


The sensitivity of MQ-7 gas sensor to carbon monoxide is quite high, so it can be used to detect various gas containing carbon monoxide. It is a low-cost sensor suitable for a variety of applications.

KS0045 MQ-7KS0045  (3)KS0045  (5)KS0045  (6)KS0045  (8)KS0045  (9)KS0045  (7)KS0045  (4)

  • good sensitivity to carbon monoxide.

  • long service life, low cost

  • simple drive circuit

  • Target Gas: carbon monoxide

  • Detectable Concentration: 300-10000ppm CO

  • Operating voltage: 5V

  • Heating Voltage VH: 5.0V±0.2V ACorDC(hight); 1.5V±0.1V ACorDC(low)

  • Load Resistance RL: adjustable

  • Heating Resistance RH: 31Ω±3Ω(Room temperature)

  • Heating Power PH: ≤350mW

  • Surface Resistance of Sensitive Material R: 2KΩ-20KΩ(in100ppmCO)

  • Sensitivity S: Rs(in air)/Rs(100ppmCO)≥5

  • Concentration Slope: α ≤0.6(R300ppm/R100ppm CO)

  • Temperature, Humidity: 20℃±2℃ ; 65%±5%RH

  • Standard Test Circuit: Vc:5.0V±0.1V; VH(high): 5.0V±0.1V; VH(low): 1.5V±0.1V

Average rating:
Share your thoughts with other customers
Write a review
Product reviews can be carried out after the member login, please click here to login
Links:autopartsColor E Ink Display
Message Us