Description
Reviews
| Brand | - |
| Category | Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals |
| Origin | - |
| Sensor Model | MQ-2 (Selectable Variants Available) |
| Operating Voltage | 5V DC |
| Output Signal | Analog & Digital TTL |
| Interface Pins | 3-Pin Header (VCC, GND, OUT) |
| PCB Dimensions | 32mm x 20mm |
| Mounting Hole Diameter | 3mm |
| Preheat Time | 24-48 Hours |
| Comparator Chip | LM393 |
| Compatibility | Arduino, ESP32, Raspberry Pi |
| Package Weight | 15 grams |
Anonymous
Apr 10, 2026
Rating: 4/5
Good value
Sensitivity needs calibration but overall solid build quality. Pins were straight and soldering was clean.
Anonymous
Mar 31, 2026
Rating: 5/5
Perfect for alarm system prototype
Used this for a home safety prototype. Digital output is reliable. Note: Not for certified safety systems, but great for learning.
Anonymous
Mar 22, 2026
Rating: 3/5
Warm up time is long
Make sure to let it preheat as stated in the docs. Otherwise works fine. Just be patient before expecting accurate readings.
Anonymous
Mar 10, 2026
Rating: 5/5
Fast shipping
Arrived quickly. Pin headers were included which was nice. Saved me some time on assembly.
Anonymous
Feb 22, 2026
Rating: 5/5
Great for Arduino projects
Works well with my Uno. Detected smoke easily during testing. The digital output threshold is adjustable via the potentiometer.
Q: How long is the typical lifespan of the sensor?
A: Lifespan varies based on usage, but typically they last 1-2 years in continuous operation before sensitivity degrades.
Q: Is calibration required before use?
A: Yes, you should use the onboard potentiometer to adjust the sensitivity threshold based on your environment.
Q: Can this be used for safety critical alarms in a home?
A: No, this module is designed for prototyping and hobby use only. It is not certified for life-safety applications.
Q: Which gas does the MQ-2 model detect specifically?
A: The MQ-2 is primarily sensitive to smoke and combustible gases like LPG, butane, and propane.
Q: Does this work with 3.3V logic microcontrollers?
A: The module operates at 5V, but the output signal can generally be read by 3.3V boards. Please check your specific board's voltage tolerance.
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