A
Anonymous
Apr 04, 2026
Rating: 5/5
Reliable module
Bought five for my students. All working as expected. Good build quality.
Description
MQ-2 Carbon Monoxide Sensor Module, Gas-Sensitive Air Quality Detector, Gas Alarm Module
Reviews
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
A
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.
A
Anonymous
Feb 19, 2026
Rating: 5/5
Great for DIY projects
Works perfectly with my Arduino setup. Easy to calibrate using the potentiometer.
A
Anonymous
Feb 03, 2026
Rating: 5/5
Easy to wire
Clear pins and simple library support found online. Very happy with purchase.
A
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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