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Smoke Sensor Flammable Gas Sensor - MQ-2

• Sensor Type: Semiconductor
• Standard Encapsulation: Bakelite, Metal cap
• Target Gas: Flammable gas, smoke gas sensor
• Detection range: 300 to 10000ppmm
• Tem. Humidity: 20°C±2°C; 55%±5%RH
• Standard test circuit: Vc: 5.0V±0.1V; VH: 5.0V±0.1V
• Preheat time: Over 48 hours

  • Model Number: MQ-2
  • Data Sheet: Date Sheet File
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  • Smoke Sensor Flammable Gas Sensor
  • Smoke Sensor Flammable Gas Sensor
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Product Specification

MQ-2 Smoke Sensor Flammable Gas Sensor Principle Introduction
Sensitive material of MQ-2 gas sensor is SnO2, which with lower conductivity in clean air. When the target flammable gas exist, the sensor’s conductivity gets higher along with the gas concentration rising. Users can convert the change of conductivity to correspond output signal of gas concentration through a simple circuit.

MQ-2 gas sensor has high sensitivity to propane and smoke, also can detect the natural gas and other flammable steam well. It is with low cost and suitable for different applications of detecting kinds of flammable gases.

MQ-2 Smoke Sensor Flammable Gas Sensor Features
It has good sensitivity to propane, smoke &etc in wide range, and has advantages such as long lifespan, low cost and simple drive circuit &etc.

MQ-2 Smoke Sensor Flammable Gas Sensor Applications
It is widely used in domestic gas leakage alarm, industrial flammable gas alarm and portable gas detector.

MQ-2 Smoke Sensor Flammable Gas Sensor Technical parameters

Model MQ-2
Sensor Type Semiconductor
Standard Encapsulation Bakelite, Metal cap
Target Gas Flammable gas, smoke gas sensor
Detection range 300 ~ 10000ppm (flammable gas)
Standard Circuit Conditions Loop Voltage Vc ≤24V DC
Heater Voltage VH 5.0V±0.1V AC or DC
Load Resistance RL Adjustable
Sensor character under 
standard test conditions
 		Heater Resistance RH 29Ω±3Ω (room tem.)
Heater consumption PH ≤950mW
Sensitivity S Ro(in air)/Rs(2000ppm C3H8) ≥5
Output Voltage Vs 2.5V ~ 4.0V (in 2000ppm C3H8)
Concentration Slope α ≤0.6 (R3000ppm/R1000ppm C3H8)
Standard test conditions Tem. Humidity 20°C±2°C; 55%±5%RH
Standard test circuit Vc: 5.0V±0.1V; VH: 5.0V±0.1V
Preheat time Over 48 hours

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