MQ-2 Gas Sensor (Arduino & Raspberry Pi Compatible)

This Gas Sensor detects Methane, Butane, Propane, alcohol, hydrogen, LPG & smoke. Flammable & combustible gases are detected by the onboard heater which sends an analog signal that increases as the concentration of flammable gases increases. This module also includes a digital output pin with TTL output. The Potentiometer on board is used to set the Digital Output Setpoint. 

Specifications:

• Wide detecting scope
• High sensitivity & stability
• Simple drive circuit
• Type: MQ-2
• Detection Zone: 300 - 10000ppmm
• Characteristic Gas:1000ppmmIso-Butane
• Sensitivity:R in air/Rin typical gas≥5
• Sensitive Resistance:1KΩ to 20KΩ in 50ppm Toluene
• Response Time:≤10s
• Recovery Time:≤30s
• Heating Resistance:31Ω±3Ω
• Heating Current:≤180mA
• Heating Voltage:5.0V±0.2V
• Heating Power: ≤900mW
• Measuring Voltage:≤24V
• Operating Conditions:
  • Ambient Temperature:-20℃～+55℃
  • Humidity:≤95%RH
  • Oxygen Content:21%
• Operating Voltage: 5V
• Compatible with Arduino & Raspberry Pi (for use with Raspberry Pi B or B+ you will need an Analog to Digital Converter Chip)
• Pinout:
  • VCC: 5V
  • AOUT: Analog Output
  • DOUT: Digital Output
  • GND: 0V

Click here to download the datasheet.

Reference: Arduino Library