Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Model Number	MQ-5
Detection Gas	LPG, Natural Gas, City Gas
Operating Voltage	5V DC
Output Signal	Analog and Digital (TTL)
Preheat Time	24-48 Hours
Sensitivity Adjustment	Potentiometer Included
Interface Type	3-Pin Header (VCC, GND, OUT)
PCB Dimensions	32mm x 20mm
Mounting Holes	4 x 3mm
Application	Home Safety, Industrial Leak Detection

6 reviews

Anonymous

Mar 29, 2026

Rating: 4/5

Easy to integrate

Documentation could be better, but standard MQ-series libraries work right out of the box. The LED indicator is a nice touch for visual feedback.

Anonymous

Mar 23, 2026

Rating: 5/5

Great value for money

I bought three of these for a home monitoring system. They are consistent and the build quality is solid for the price point.

Anonymous

Mar 18, 2026

Rating: 3/5

Works but gets hot

The sensor functions as described, but the heating element gets quite hot. Make sure your enclosure has proper ventilation.

Anonymous

Mar 13, 2026

Rating: 4/5

Good sensitivity, needs warm-up

Detects gas leaks very quickly once heated up. Just remember to let it run for at least 24 hours before relying on the readings for any serious application.

Anonymous

Mar 12, 2026

Rating: 5/5

Reliable detection

Tested it with a small amount of propane from a lighter (safely) and it triggered immediately. Very responsive sensor.

Anonymous

Mar 03, 2026

Rating: 5/5

Perfect for Arduino Projects

This sensor module works flawlessly with my Arduino Uno. The analog output is stable after the initial warm-up period, and the digital threshold is easy to adjust with the onboard potentiometer.

5 FAQ

Q: What is the current consumption during operation?

A: The heater consumes approximately 150mA at 5V. Please ensure your power supply can handle this load, especially if connecting multiple sensors.

Q: Is the PCB coated for humidity protection?

A: The standard version does not have a conformal coating. If you plan to use it in high-humidity environments, we suggest applying a protective coating yourself.

Q: Does this module output 3.3V or 5V logic levels?

A: The module operates at 5V. While the analog output varies, the digital DO pin outputs TTL levels compatible with 5V microcontrollers like Arduino Uno.

Q: Can this detect carbon monoxide?

A: No, the MQ-5 is specifically designed for LPG, natural gas, and city gas. For carbon monoxide, please look at our MQ-7 sensor module.

Q: How long does the preheat time really need to be?

A: For stable and accurate readings, we recommend a continuous preheat time of 24 to 48 hours. Shorter times may result in fluctuating baseline values.

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