Grove - Gas Sensor(MQ9)

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How to choose a gas sensor ? The Grove - Gas Sensor module is useful for gas leakage detecting(in home and industry)

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We've released the Seeed Gas Sensor Selection Guide, it will help you choose the gas sensor that best suits your needs.

The Grove - Gas Sensor module is useful for gas leakage detecting(in home and industry). It can detect LPG, i-butane, methane, alcohol, Hydrogen, smoke and so on. Measurements can be taken as soon as possible based on its fast response time. Also, the sensitivity can be adjusted by the potentiometer.

Each Grove - Gas Sensor Kit consists of one gas sensor base and four detectors, including MQ2, MQ3MQ5and MQ9. Below is a contrast table of them. You can switch the detector on the base according to specific target gases.

Sysmbol MQ-2 MQ-3 MQ-5 MQ-9
Detect Gas

Combustible Gas, Smoke

Alcohol Vapor LPG, Natural Gas, Town Gas Carbon Monoxide, Coal Gas, Liquefied Gas
Concentration 300-10000ppm 0.04-4mg/L Alcohol 300-10000ppm 10-1000ppmCO;100-10000PPm Gas

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Hot-swapping the grove may lead to IC burnout, please turn off the power of the main board before swapping grove.


  • High sensitivity to Combustible gas in wide range

  • Stable performance, long life, low cost

  • Fast response

  • Wide detection range

  • Simple drive circuit

Technical details

Dimensions 40mm x20mm x18mm
Weight G.W 17g
Battery Exclude

Part List

Grove - Gas Sensor(MQ9) 1
Grove Cable 1


HSCODE 9027900000
USHSCODE 90230000
UPC 841454108320

Grove - Gas Sensor(MQ9)

Wiki of Grove - Gas Sensor(MQ9)

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