MQ-2 - Smoke Gas LPG Butane Hydrogen Graphene-based Gas Sensor Detection Module (MQ 2)

Graphene-based gas and vapor sensors have been attached much attention in recent years due to their variety of structures, unique sensing performance, room-temperature working conditions, and tremendous application prospects, etc.

MQ-2 gas sensor sensitive material used in the clean air low conductivity tin oxide (SnO2). In the presence of combustible gases, the conductivity of the sensor increases with the increasing concentration of combustible gases in the air. Using a simple circuit one can convert the change in conductivity of the gas concentration corresponding to the output signal.

MQ-2 gas sensor can detect, propane, hydrogen sensitivity, natural gas, and other flammable vapors. This sensor can detect a variety of flammable gas, are low-cost sensors for a variety of applications. These sensors may be used in homes and factories leakage monitoring device suitable for the detection of gas, butane, propane, methane, smoke, etc.

Wiring:

VCC: positive power supply (5V); GND: power supply is negative; DO: TTL switching signal output; AO: analog signal output

Specification:

• MQ-2 Smoke Liquefied Flammable Methane Gas Sensor Module

• Input voltage : DC5V Power consumption ( current ): 150mA DO output : TTL digital 0 and 1 ( 0.1 and 5V) AO output :0.1-0 .3 V ( relative to pollution ) , the maximum concentration of a voltage of about 4V

• Using the high-quality dual-panel design, with power indicator and TTL signal output instructions. The switching signal having a DO (TTL) output and analog output AO. TTL output valid signal is low. ( Low-level signal when the output light can be directly connected to the microcontroller or relay module )

• Analog output voltage with a higher concentration of higher voltage There are four screw holes for easy positioning. Has a long life and reliable stability Rapid response and recovery characteristic

• Special note: After the sensor is powered, the sensor needs to warm up around the 20S to achieve stability in data measurement, the sensor does get heated up it is a normal phenomenon, because of the internal heating wire.