MQ2 MQ-2 SMOKE SENSOR MODULE

MQ-2 Smoke and Gas Sensor Price in Pakistan

The MQ-2 module is a heated metal-oxide semiconductor sensor for educational smoke and combustible-gas detection projects. It responds broadly to several gases and vapours, so it is useful for relative detection and threshold experiments rather than selective laboratory measurement.

Connections and outputs

• VCC: listed 5V supply
• GND: common ground
• AOUT: analog signal that changes with sensor response
• DOUT: adjustable digital threshold output on supported module versions

Listed characteristics

• Broad response to smoke and combustible gases such as LPG, propane, methane and hydrogen
• Listed sensitivity range: approximately 200 to 10,000ppm, depending on gas and calibration
• Analog output: up to the module supply range
• Digital TTL threshold output
• Approximate module dimensions: 36 × 20 × 10mm

Warm-up and calibration

The sensing element contains a heater and needs warm-up before readings stabilise. Follow the sensor manufacturer’s conditioning and calibration procedure for the intended gas and environment. Temperature, humidity, ageing and exposure history can change the response.

Safety limitation

This module is intended for learning and prototyping. It is cross-sensitive, is not a selective gas analyser and must not replace a certified smoke alarm, gas alarm or life-safety detector.

For controller testing, see the Arduino UNO R3 with cable. Explore more gas sensors from Robonation Pakistan.

For sensor guidance, review the official Winsen MQ-2 documentation.