MQ-2 Gas Sensor Module

MQ-2 Gas Sensor Module
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  • Product Code:SQ1420
  • Availability: 1000
  • $0.85
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  • Ex Tax:$0.85
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Tags: gas sensor, smoke detector, MQ-2, combustible gas, Arduino module, safety sensor, MQ-2 sensor

The MQ-2 is a semiconductor gas sensor module designed for detecting smoke and a range of combustible gases, including LPG, propane, methane, hydrogen, and alcohol. Its sensing element is made of tin dioxide (SnO2), whose conductivity increases when exposed to reducing gases, allowing the module to output a signal proportional to gas concentration. The module provides both an analog output (AO) for continuous measurement and a digital output (DO) with a TTL signal for threshold-based detection, adjustable via an onboard potentiometer.
Smoke detection module operates on a 5V DC supply and is commonly used in gas leakage alarms, fire detection systems, and air quality monitoring projects. With its simple interface and compatibility with microcontrollers such as Arduino, the MQ-2 module offers a practical and cost-effective solution for smoke detection and combustible gas sensing in both household and industrial applications.

Smoke detection module Application

  1. Household gas leakage alarms
  2. Industrial combustible gas detection
  3. Fire and smoke detection systems
  4. Air quality and pollution monitoring
  5. Portable gas detectors
  6. Arduino and microcontroller-based sensing projects

Smoke detection module Specifications

  1. Operating Voltage: 5V DC
  2. Operating Current: 150mA
  3. Sensing Material: SnO2 (tin dioxide)
  4. Detection Range: 300–10000 ppm (combustible gases)
  5. Analog Output (AO): 0.1–0.3V (clean air, typical)
  6. Digital Output (DO): TTL level (0V or 5V)
  7. Heating Resistance: 30Ω ± 3Ω (room temperature)
  8. Heating Consumption: ≤ 950mW
  9. Sensitivity: Rs (in air) / Rs (2000ppm C3H8) ≥ 5
  10. Dimensions: 22 × 20 × 32 mm
  11. Operating Temperature: -20°C to +55°C
Interfaces
Interface Type Digital And Analog
Electrical Parameters
Input Current 150mA
Input Voltage 5V DC
Physical Parameters
Size  32 x 20 x 22 (L x W x H) 
Weight 5g

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