MQ-2 Flammable Gas and Smoke Sensor

The MQ2 Flammable Gas and Smoke Sensor can detect gas leaks (in homes and industries) of various kinds, such as LPG, i-butane, methane, alcohol, hydrogen, and smoke. It has a fast response time that allows for quick measurements. The sensitivity of the sensor can be adjusted by the potentiometer.

The MQ2 gas sensor can measure gas concentrations from 200 to 10000ppm. It is very sensitive to propane, hydrogen, methane, and LPG.

The MQ series of gas sensors have a small heater and an electro-chemical sensor inside. They can detect a range of gases at room temperature indoors.

The MQ2 gas sensor uses SnO2 as the sensitive material, which has lower conductivity in clean air. When the target gas is present, the conductivity of the sensor increases with the gas concentration. The MQ2 sensor can be used to detect different combustible gases, especially methane. It is low-cost and suitable for various applications. This sensor can be used to make a wireless gas leak detector for home security systems.

Features:-

• High sensitivity to Propane, smoke, Hydrogen, LPG, CO, alcohol, Smoke.
• Fast response time <10s
• High sensitivity
• Stable and long life

Connections:-

Connecting five volts across the heating (H) pins keeps the sensor hot enough to function correctly. Connecting five volts at either the A or B pins causes the sensor to emit an analog voltage on the other pins. A resistive load between the output pins and ground sets the sensitivity of the detector.

Applications:-

• Gas leak detection system
• Fire/safety detection system
• Gas leak alarm
• Gas detector
• Industrial combustible gas detector

specification-