A
Anonymous
Apr 13, 2026
Rating: 5/5
Exactly as described
Fast shipping and the sensor responds well to test gas. Good value for money.
Description
Low Price, High Quality, Efficient - Worry-Free and Effortless Procurement
Reviews
Attributes
| Brand | - |
| Category | Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals |
| Origin | - |
| Sensor Model | MQ-7 |
| Detection Gas | Carbon Monoxide (CO) |
| Operating Voltage | 5V DC |
| Analog Output | 0V to 5V |
| Digital Output | TTL Logic Level |
| Heater Voltage | 5.0V ± 0.1V |
| Operating Temperature | -10°C to 50°C |
| Module Dimensions | 32mm x 20mm x 22mm |
| Pin Interface | 4-Pin Header |
| Sensitivity Adjustment | Onboard Potentiometer |
5 reviews
A
Anonymous
Apr 11, 2026
Rating: 5/5
Reliable detection
Integrated this into my home monitoring system. The digital output threshold is easy to set.
A
Anonymous
Mar 28, 2026
Rating: 5/5
Great for Arduino projects
Works well with my microcontroller. Calibration took some time but readings are stable.
A
Anonymous
Feb 08, 2026
Rating: 4/5
Solid build quality
PCB looks clean. Pins are well soldered. Just wish the manual was more detailed.
A
Anonymous
Jan 29, 2026
Rating: 4/5
Good module, needs warmup
Remember this sensor needs a heating cycle. Once warm, it detects CO changes quickly.
5 FAQ
Q: Can it detect smoke as well?
A: No, this is specifically tuned for Carbon Monoxide. Use MQ-2 for smoke.
Q: Does this work with 3.3V logic?
A: The module operates at 5V, but the output can be interfaced with 3.3V systems using a voltage divider.
Q: How long does it need to warm up?
A: We recommend a 24-48 hour initial aging process, then a few minutes before each use.
Q: What is the pinout configuration?
A: VCC, GND, DO (Digital Out), AO (Analog Out). Please check the silkscreen on the board.
Q: Is this certified for home safety alarms?
A: This is a component module for development. Certified equipment requires additional validation.
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