MQ2 Gas Sensor

The MQ2 Gas Sensor Module is a widely used gas and smoke detection device designed to detect the presence of combustible gases in the environment. This includes LPG, propane, methane, hydrogen, alcohol, smoke, and carbon monoxide (CO). The sensor uses tin dioxide (SnO₂) as its sensitive material, which has low conductivity in clean air but shows increased conductivity as the concentration of combustible gases rises. The module offers both analog and digital outputs, making it highly compatible with popular development platforms like Arduino, Raspberry Pi, ESP32, and other microcontrollers. Its adjustable sensitivity, fast response time, and low power consumption make it ideal for DIY projects, safety systems, and industrial gas monitoring applications.

Key Features:

• Detects multiple gases: LPG, propane, methane, hydrogen, CO, smoke, and alcohol

• High sensitivity and fast response time

• Analog and digital output support

• Adjustable sensitivity via onboard potentiometer

• Easy to use with microcontrollers and development boards

• Long life and stable performance

• Compact and lightweight design

• Low power consumption

Specifications:

• Model: MQ2 Gas Sensor

• Operating Voltage: 5V DC

• Detection Range: 300 – 10,000 ppm

• Current Consumption: < 150 mA

• Preheat Time: 20 seconds

• Response Time: < 10 seconds

• Output Type: Analog & Digital

• Sensing Material: SnO₂ (Tin Dioxide)

• Operating Temperature: -20°C to +50°C

• Dimensions: Approx. 32mm x 22mm x 27mm (module form)

• Mounting Type: Through-hole / PCB-mounted