Easy to use MQ-2 sensor for measuring H2, LPG, CH4, CO, Alcohol, Smoke or Propane, Butane, Methane, Hydrogen. The MQ-2 measures a gas concentration of 300 to 10'000ppm and is ideal for detecting a gas leak, as a gas alarm or for other robotic and microcontroller projects. This sensor is ready for connection to a microcontroller, e.g. an arduino board. For use with a Raspberry Pi, an AD converter is also required.
The sensors of the MQ series use a small heating element with an electronic-chemical sensor. They are sensitive to various gases and are suitable for use in rooms.
If five volts are connected across the heater pins (H), the sensor will remain hot enough to function properly. When five volts are connected to pins A or B, the sensor sends an analog voltage to the other pins. A resistive load between the output pins and ground determines the sensitivity of the detector. The ohmic 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.
Please note the PDF for details regarding the technical data.
32 x 20 x 22mm
Parts as depicted in the photos.