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MQ3 Alcohol Sensor Semiconductor Sensor for Alcohol
Descriptions:
- Sensitive material of MQ-3 gas sensor is SnO2, which with lower conductivity in clean air. When the target alcohol gas exist, The sensors conductivity is more higher along with the gas concentration rising. Please use simple electrocircuit, Convert change of conductivity to correspond output signal of gas concentration.
- MQ-3 gas sensor has high sensitity 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
Character
- Good sensitivity to alcohol gas
- Long life and low cost
- Simple drive circuit
Application
- Vehicel alcohol detector
- Portable alcohol detector
| Model No. | MQ-3 | ||
| Sensor Type | Semiconductor | ||
| Standard Encapsulation | Bakelite (Black Bakelite) | ||
| Detection Gas | Alcohol gas | ||
| Concentration | 0.04-4mg/l alcohol | ||
| Circuit | Loop Voltage | Vc | ≤24V DC |
| Heater Voltage | VH | 5.0V±0.2V AC or DC | |
| Load Resistance | RL | Adjustable | |
| Character | Heater Resistance | RH | 31Ω±3ΩRoom Tem. |
| Heater consumption | PH | ≤900mW | |
| Sensing Resistance | Rs | 2KΩ-20KΩ(in 0.4mg/l alcohol ) | |
| Sensitivity | S | Rs(in air)/Rs(0.4mg/L Alcohol)≥5 | |
| Slope | α | ≤0.6(R300ppm/R100ppm Alcohol) | |
| Condition | Tem. Humidity | 20±265%±5%RH | |
| Standard test circuit | Vc:5.0V±0.1V VH: 5.0V±0.1V | ||
| Preheat time | Over 48 hours | ||
