Grab'eM MQ-2 LPG/METHANE Module(Multicolor)

Sensitive material of MQ-2 gas sensor is SnO2 which has lower conductivity in clean air. When the target combustible gas exists in the ambient environment, the conductivity of the sensor becomes higher along with the gas concentration rising. Just simple circuits can convert the change of conductivity to corresponding output signals of the gas concentration. It has high sensitivity to LPG, propane and hydrogen, and also can be used to detect methane and other combustible steams. 4-Pin anti-reverse cable includedConnected directly with I/O port of MCU, needless of external circuitContain an adjustable precision potentiometer for sensitivity adjustmentMQ-2 gas sensor has high sensitivity to LPG, Propane and Hydrogen, also could be used to Methane and other combustible steam, it is low cost and suitable for various applications.Using high-quality dual-panel design, with a power indicator and TTL signal output instructions; With a the DO switch signal (TTL) output, and AO analog signal output; TTL output valid signal is low level; (When the low level output signal lights, it can be connected directly to the microcontroller or relay module)TTL output signal can be connected directly to a microcontroller IO port or connect to the relay module, potentiometer is used to adjust the output level transition thresholdPinoutVCC (+5V)GND (0V)DO (Digital Out)AO (Analog Out)