Product Specifications /Features

MQ-3 gas sensor has high sensitity to Alcohol, and has good resistance to disturb of gasoline and vapor. The sensor could be used to detect alcohol with different concentration, it is with low cost and suitable for different application.
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±3Ω(Room 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. 20℃±2℃; Humidity 65%±5%RH
Standard test circuit Vc: 5.0V±0.1V;
VH: 5.0V±0.1V
Preheat time: Over 48 hours

Competitive Advantages

Well and High Quality Control ,
Prompt Delivery ,
Competitive Prices ,
Small Order Acceptable

Buyer Keywords
alcohol sensor, gas sensor, alcohol tester