MQ-2 Gas Sensor Smoke Module, Hydrogen Butane LPG Methane Detector


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Overview and Specifications:

Product Attribute
Output : Other
Type : Gas Sensor
Material : Polymer
Model Number : MQ2
Usage : Other
Theory : Other
is_customized : Yes


Material: PCB

Color: blue

Size: 32 * 20 * 22 mm

Weight: 15G.


1. Adopt high-quality double-panel design, with power indicator and TTL signal output indicator;

2. DO switch signal (TTL) output and AO analog signal output;

3. The effective output signal of TTL is low level. (when the signal light is on at low power output, it can be directly connected to the MCU or relay module)

4. The output voltage of analog quantity increases with higher concentration.

5. Good sensitivity to liquefied gas, natural gas, urban gas and smoke.

6. There are four screw holes for easy positioning;

7. Product profile size: 32(L)*20(W)*22(H)

8. Long service life and reliable stability

9. Fast response recovery feature. Electrical performance: Input voltage: DC5V power consumption (current) : 150mA; DO output: TTL digital quantities 0 and 1 (0.1 and 5V)

AO output: 0.1-0.3v (relatively pollution-free), the maximum concentration voltage is about 4V

Special reminder:

After the sensor is powered on, it needs to preheat 20 seconds or so, and the measured data will be stable. The sensor heating is a normal phenomenon, because there is electric heating wire inside, and if the hand is hot, it will not be normal.

Connection mode:

1. VCC: power positive pole (5V)

2. GND: connect the power negative pole

3. DO:TTL switch signal output

4. AO: analog signal output.