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Grove - Gas Sensor(MQ3)

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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). It can detect LPG, i-butane, methane, alcohol, Hydrogen, somke 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.

There are different gas detectors for sale, like MQ2, MQ3, MQ5 and MQ9. Below is a contrast table of them. enter image description here

Features High sensitivity to Combustible gas in wide range Stable performance, long life, low cost Fast response Wide detection range Simple drive circuit For all Grove users (especially beginners), we provide you guidance PDF documents. Please download and read through Preface - Getting Started and Introduction to Grove before your using of the product.


Please visit our wiki page for more info about this product. It will be appreciated if you can help us improve the documents, add more demo code or tutorials. For technical support, please post your questions to ourforum.

More information about gas sensor, please refer to this manual.

For more detail, please visit:


Grove-Gas Sensor v1.4


ID Name Designator Footprint Quantity
2 NO J2 4P-LEADED-2.0 1
3 Gas Sensor Socket J1 6P-D17.6X9.8H 1
4 NO U1 SOT23-5 1
5 CD32-100 L2 SD32-4R7MC 1
6 DNP C1 C0603 1
7 100uF6.3v C5 AVX-B 1
8 10uF25v C4,C2 C0805 2
9 DNP C3 AVX-A 1


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