Attributes

Brand	-
Category	Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals
Origin	-
Model Number	MQ-9
Detection Gases	Carbon Monoxide, LPG, Propane
Operating Voltage	5V DC
Output Signal	Digital DO & Analog AO
Heating Voltage	5V ± 0.1V
Load Resistance	10kΩ (Adjustable)
Operating Temperature	-10°C to 50°C
Board Dimensions	32mm x 20mm
Pin Configuration	4-Pin Header (VCC, GND, DO, AO)
Recommended Preheat	24-48 Hours

5 reviews

Anonymous

Apr 11, 2026

Rating: 5/5

Works as expected

Used this with an ESP32 for a prototype. Detection is responsive to test gas.

Anonymous

Apr 09, 2026

Rating: 5/5

Easy to use

Plug and play with Arduino. Clear signal and easy to calibrate threshold.

Anonymous

Mar 26, 2026

Rating: 5/5

Great for prototyping

Perfect for my gas leak detector prototype. Clear analog output.

Anonymous

Mar 22, 2026

Rating: 5/5

Fast Delivery

Product arrived well packaged. Pins are intact and soldering looks good.

Anonymous

Feb 10, 2026

Rating: 4/5

Good value

Sensitive sensor but needs long warm-up time before readings stabilize.

5 FAQ

Q: Is the threshold adjustable?

A: Yes, via the onboard blue potentiometer for the digital output pin.

Q: What microcontroller works best?

A: Compatible with Arduino, ESP8266, ESP32, and Raspberry Pi GPIO.

Q: Does it detect methane?

A: Yes, it detects combustible gases including methane and natural gas.

Q: How long until stable?

A: Please allow 24-48 hours initial preheat for best accuracy and stability.

Q: Is this safe for home alarm systems?

A: This is a component module for development. For life safety, use certified devices.

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