Attributes

Brand	-
Category	Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals
Origin	-
Brand	OpenJumper
Model Number	MQ-2
Operating Voltage	5V DC
Output Signal	Digital Switch Output and Analog Output
Detectable Gases	Smoke, LPG, i-butane, propane, methane, alcohol, hydrogen
Interface Type	3-Pin Header (VCC, GND, OUT)
PCB Length	32 mm
PCB Width	20 mm
Operating Temperature	-10°C to 50°C
Protection Feature	Reverse-Polarity Protection Diode

5 reviews

Anonymous

Mar 31, 2026

Rating: 4/5

Sensitive sensor

Detects smoke quickly but avoid high humidity environments for best accuracy.

Anonymous

Mar 31, 2026

Rating: 4/5

Good value

Needs some calibration time but works well for the price point. Shipping was fast.

Anonymous

Mar 09, 2026

Rating: 5/5

Robust build

The protection diode is a nice touch for beginners who might wire it backwards.

Anonymous

Feb 24, 2026

Rating: 5/5

Works great with Arduino

Easy to integrate into my smart home prototype. The digital output is very responsive.

Anonymous

Jan 28, 2026

Rating: 5/5

Perfect for students

We used these in our robotics club. Durable and easy to wire up for beginners.

5 FAQ

Q: Can I use this with Raspberry Pi?

A: Yes, but ensure logic level compatibility as the sensor operates at 5V.

Q: How do I adjust sensitivity?

A: Use the onboard potentiometer to adjust the digital threshold output.

Q: What is the current consumption?

A: Approximately 150mA during the heating phase.

Q: Does it detect Carbon Monoxide?

A: No, MQ-2 is for combustible gases. Use MQ-7 for Carbon Monoxide detection.

Q: Is this certified for residential use?

A: No, this is for educational and prototyping purposes only. Not for safety critical systems.

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