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

Anonymous

Apr 13, 2026

Rating: 5/5

Exactly as described

Fast shipping and the sensor responds well to test gas. Good value for money.

Anonymous

Apr 11, 2026

Rating: 5/5

Reliable detection

Integrated this into my home monitoring system. The digital output threshold is easy to set.

Anonymous

Mar 28, 2026

Rating: 5/5

Great for Arduino projects

Works well with my microcontroller. Calibration took some time but readings are stable.

Anonymous

Feb 08, 2026

Rating: 4/5

Solid build quality

PCB looks clean. Pins are well soldered. Just wish the manual was more detailed.

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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