Product Description
Semiconductor gas sensor
Key Specifications:
- Sensitive material of MQ3 gas sensor is SnO2, which with lower conductivity in clean air When the target alcohol gas exist
- Sensor's conductivity is more higher along with the gas concentration rising
- Please use simple electro-circuit, convert change of conductivity to correspond output signal of gas concentration
- MQ3 gas sensor has high sensitivity to alcohol, and has good resistance to disturb of gasoline, smoke and vapor
- The sensor could be used to detect alcohol with different concentration, it is with low cost and suitable for different application
- Features and application:
- Good sensitivity to alcohol gas
- Long lifespan and low cost
- Simple drive circuit
- Vehicle alcohol detector
- Portable alcohol detector
- Sensor type: semiconductor
- Standard encapsulation: bakelite (black bakelite)
- Detection gas: alcohol gas
- Concentration: 0.4-4mg/L alcohol
- Loop voltage (Vc): ≤24V DC
- Heater voltage (VH): 5.0V ±0.2V Acor DC and 1.5V ±0.1V AC or DC
- Load resistance (RL): adjustable
- Heater resistance (RH): 31 ±3Ω (room temperature)
- Heater consumption (PH): ≤900mW
- Sensing resistance (Rs): 2 to 20kΩ (in 0.4mg/L alcohol)
- Sensitivity (S): Rs (in air)/Rs (0.4mg/L alcohol) ≥5
- Slope (α): ≤0.6 (R300ppm/R100ppm alcohol)
- Temperature humidity: 20 ±2℃, 65 ±5%RH
- Standard test circuit:
- Vc: 5.0V ±0.1V
- VH (high): 5.0V ±0.1V
- VH (low): 5.0V ±0.1V
- Preheat time: over 48 hours
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