MQ3 Alcohol Sensor Semiconductor Sensor for Alcohol
  • MQ3 Alcohol Sensor Semiconductor Sensor for Alcohol

  • SKU:21382
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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

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