Attributes

Brand	-
Category	Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals
Origin	-
Sensor Model	MQ-2
Operating Voltage	5V DC
Detection Capability	LPG, Propane, Hydrogen, Smoke
Output Signal	Digital DO and Analog AO
Interface Type	3-Pin Header
Operating Temperature	-10°C to 50°C
PCB Size	32mm x 20mm x 10mm
Weight	8g
Calibration	Adjustable Potentiometer
Compatibility	Arduino, Raspberry Pi, ESP8266

5 reviews

Anonymous

Apr 04, 2026

Rating: 5/5

Reliable module

Bought five for my students. All working as expected. Good build quality.

Anonymous

Mar 01, 2026

Rating: 4/5

Note: Not for life safety

Good sensor for data logging, but remember this is not a certified safety device.

Anonymous

Feb 19, 2026

Rating: 5/5

Great for DIY projects

Works perfectly with my Arduino setup. Easy to calibrate using the potentiometer.

Anonymous

Feb 03, 2026

Rating: 5/5

Easy to wire

Clear pins and simple library support found online. Very happy with purchase.

Anonymous

Jan 31, 2026

Rating: 4/5

Good sensitivity

Detects smoke well. Needs some warm-up time before stable readings.

5 FAQ

Q: What voltage does the output pin use?

A: The digital output is TTL compatible, typically 5V logic.

Q: How long should I let it warm up?

A: We recommend 24 to 48 hours initial burn-in for stable readings.

Q: Does it detect natural gas?

A: Yes, it is sensitive to methane and other combustible gases.

Q: Is this suitable for a certified home CO alarm?

A: No, this is for hobbyist and industrial monitoring purposes only, not life safety.

Q: Can I use this with 3.3V boards?

A: Yes, but ensure logic levels are compatible or use a level shifter.

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