MQ-2 gas sensor

Description

Description: MQ-2 gas sensor as ready-to-connect module for Arduino and Raspberry Pi Easy-to-use sensor for measuring the concentration of LPG, i-butane, propane, methane, alcohol, hydrogen and smoke in the air. The MQ-2 measures a gas concentration of 100 to 10000ppm and is ideal for detecting a gas leak, as a gas alarm, or for other robotics and microcontroller projects. The sensors of the MQ series use a small heating element with an electronic-chemical sensor. It is sensitive to various gases and are suitable for use in rooms. The sensor has a high sensitivity and fast response time, but it takes a few minutes to give accurate readings as the sensor needs to heat up. The measured values ​​of the sensor are output as an analog value, which can be easily evaluated with a microcontroller. This sensor is ready for connection to a microcontroller, e.g. An Arduino board. For use with a Raspberry Pi, an AD converter is required. Pin assignment: VCC power supply 5VGND ground connectionAOUT - Analog outputDOUT - Digital OutputTo set the threshold, the module has a potentiometer. On the digital pin, the sensor outputs only a 0 or 1, depending on whether the set threshold value is exceeded. Caution: The sensor is warm during operation! For testing, you will find a sample ketch in the download section. Just upload it to an Arduino board and use a lighter to release some gas near the sensor. Details: Operating voltage 5V DC Analog output (measured value) Digital output (threshold) Scope of Delivery: 1 x fully assembled module as shown