A
Anonymous
Apr 15, 2026
Rating: 5/5
Fast Delivery
Packaging was secure. All pins labeled clearly.
Description
MQ2 Smoke and Combustible Gas Sensor Module
Reviews
Attributes
| Brand | - |
| Category | Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals |
| Origin | - |
| Operating Voltage | 5V DC |
| Output Signal | Analog & Digital TTL |
| Sensing Material | Metal Oxide Semiconductor |
| Heating Voltage | 5.0V ± 0.2V |
| Load Resistance | Adjustable Potentiometer |
| Heating Consumption | ≤ 800mW |
| Sensing Resistance | 10kΩ - 60kΩ |
| Detection Range | 100-10000 ppm (Model Dependent) |
| Response Time | ≤ 10 Seconds |
| Operating Temperature | -10°C to 50°C |
5 reviews
A
Anonymous
Mar 10, 2026
Rating: 5/5
Great for Prototyping
Used the MQ135 for an air quality monitor. Works well with Arduino Uno.
A
Anonymous
Mar 03, 2026
Rating: 3/5
Calibration Required
Works but requires careful calibration for precise readings.
A
Anonymous
Feb 20, 2026
Rating: 5/5
Perfect Fit
Used MQ2 for smoke detection test. Very sensitive.
A
Anonymous
Feb 19, 2026
Rating: 4/5
Good Value
Needs warm-up time but accurate enough for hobby projects.
5 FAQ
Q: How long to preheat?
A: Typically 24-48 hours for initial stabilization, then few minutes.
Q: Can I use this with 3.3V logic?
A: Yes, but heating requires 5V. Use level shifter for data.
Q: Can MQ135 detect CO2?
A: It detects broad air quality including CO2 approximations.
Q: What is the lifespan?
A: Typically 1-2 years depending on usage environment.
Q: Is there a library available?
A: Yes, many open-source libraries exist for Arduino.
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