10db MQ-3 Alkohol Etanol gázérzékelő Arduino

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nductivity 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
- Good sensitivity to alcohol gas
- Long life and low cost
- Simple drive circuit
- Vehicel alcohol detector
- Portable alcohol detector
Model No.MQ-3
Sensor TypeSemiconductor
Standard EncapsulationBakelite (Black Bakelite)
Detection GasAlcohol gas
Concentration0.04-4mg/l alcohol
CircuitLoop VoltageVc≤24V DC
Heater VoltageVH5.0V±0.2V AC or DC
Load ResistanceRLAdjustable
CharacterHeater ResistanceRH31Ω±3ΩRoom Tem.
Heater consumptionPH≤900mW
Sensing ResistanceRs2KΩ-20KΩ(in 0.4mg/l alcohol )
SensitivitySRs(in air)/Rs(0.4mg/L Alcohol)≥5
Slopeα≤0.6(R300ppm/R100ppm Alcohol)
ConditionTem. Humidity20±265%±5%RH
Standard test circuitVc:5.0V±0.1V
VH: 5.0V±0.1V
Preheat timeOver 48 hours
10PCS MQ-3 Alcohol Ethanol Sensor Gas Detector Sensor For Arduino

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