SuperDroid Robots
Robots, Parts, & Custom Solutions
Gas sensors makes it possible to measure concentrations of gasses such as alcohol, methane, propane, butane, and carbon monoxide.
Category List
Pololu Flammable Gas & Smoke Sensor MQ-2
Item Details
Pololu Flammable Gas & Smoke Sensor MQ-2
Item Name:
Pololu Flammable Gas & Smoke Sensor MQ-2
Item #:
Your Price:
8 Ready to Ship!

Product Image Gallery:


This flammable gas and smoke sensor detects the concentrations of combustible gas in the air and ouputs its reading as an analog voltage. The sensor can measure concentrations of flammable gas of 300 to 10,000 ppm.The sensor can operate at temperatures from -20 to 50°C and consumes less than 150 mA at 5 V. Please read the MQ2 datasheet (184k pdf) for more information about the sensor.


Connecting five volts across the heating (H) pins keeps the sensor hot enough to function correctly. Connecting five volts at either the A or B pins causes the sensor to emit an analog voltage on the other pins. A resistive load between the output pins and ground sets the sensitivity of the detector. Please note: that the picture in the datasheet for the top configuration is wrong. Both configurations have the same pinout consistent with the bottom configuration.The resistive load should be calibrated for your particular application using the equations in the datasheet, but a good starting value for the resistor is 20 kΩ.

We offer a Pololu breakout board that makes it easier to interface with these sensors.



This semiconductor gas sensor detects the presence of combustible gas and smoke at concentrations from 300 to 10,000 ppm. The sensor's simple analog voltage interface requires only one analog input pin from your microcontroller.
Support Links
Related Items
Pololu MQ Gas Sensor Carrier

This carrier board is designed to work with any of the MQ-series "gas sensors".

39 Ready to Ship!

Pololu Methane Gas Sensor MQ-4

This semiconductor gas sensor detects the presence of methane (CNG) gas at concentrations from 300 ppm to 10,000 ppm, a range suitable for detecting gas leaks.

8 Ready to Ship!

New Items
6" Black Cable Tie (100 pack)

100 pack of black UV resistant nylon with flexible tape section, pull tight and does not come undone. Length 6 inches.

250 Ready to Ship!
YDLIDAR G4 - 360 degree 16 meter 2D LIDAR

YDLIDAR G4 LIDAR is a 360-degree two-dimensional laser range scanner (LIDAR)

1 Ready to Ship!
Powered by SuperDroid Robots, Inc