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Keyestudio MQ-7 Carbon Monoxide CO Gas Sensor Detection Module for Arduino Sensor Starter DIY Electronic Project

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1-3 day US shipping

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.
Feature
  • good sensitivity to carbon monoxide.

  • long service life, low cost

  • simple drive circuit

Application
  • household gas leak alarm

  • Industrial-level carbon monoxide gas alarm

  • Portable gas detector

Specification
  • Target gas: carbon monoxide

  • Detectable concentration: 300-10000ppm CO

  • Loop voltage Vc ≤10V DC

  • 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 Rs 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

 
 

 

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As of now, we’re delivering to the United States only.

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Once your parcel has left our Fulfillment Center, you will receive an email with a tracking number to monitor your parcel movements.

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Yes, you can write your business address in your order details if it’s more convenient to you.

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Yes, you can select delivery to a PO Box if it’s more convenient to you.

Can you ship my order to APO or FPO military addresses?

Yes, we ship anywhere in the United States, and to all US territories and military APO/FPO addresses.

What happens to my parcel if it is delivered while I’m not there?

Depending on the destination and the package size, your parcel will be left in your mailbox or on your porch, or it may be left with a neighbour.

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