Electrobot MQ2 Smoke LPG Butane Hydrogen Gas Sensor Detector Module for Arduino Raspberry Pi Gas Sensor

The MQ2 sensor is used to detect combustible and harmful gases for consumer and industrial applications, the gases this sensor can detect are: LPG, i-butane, propane, methane, alcohol, hydrogen and smoke, these gases are not only highly combustible but also harmful. The sensitivity of MQ2 sensor can be adjusted to suit the requirements of the application via a manual potentiometer located on the back of the sensor. The output voltage from the Gas sensor increases when the concentration of gas increases./////// Specifications: Model: MQ-2/MQ2. Chip: LM393, ZYMQ-2 Gas Sensors. Working Voltage: 5V DC. Current: 150 mA. Pin Definition: 1-Output, 2-GND, 3-VCC. Dual Signal output: Analog output and TTL level output. DO Output: TTL digital quantity 0 and 1 (0.1 and 5V). AO output: 0.1-0.3v (relatively pollution-free), the highest concentration voltage is about 4V. Gas Detection: LPG, i-butane, propane, methane, alcohol, hydrogen and smoke. Size: 32x22x27mm/1.26x0.87x1.06Inches(LxWxH). Package: 1Pc./////// Important Instruction: After the sensor is powered on, it needs to preheat 20S or so, and the measured data is stable. The sensor heating is a normal phenomenon, because there is a heating wire inside, it is abnormal if it is hot.