MQ-3 Alcohol Gas Sensor

Product Code: 0738
Availability: In Stock

10 or more $5.69CAD
100 or more $5.39CAD
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For motor vehicle drivers and other non-drinking and operating personnel on-site testing, also used in other places of ethanol vapor detection, detection of alcohol: detection range of 10 to 1000ppm.


  • The main chip: LM393, MQ-3 gas sensor
  • Signal output instructions;
  • Dual signal output (analog output, and TTL level output)
  • TTL output valid signal is low, can be connected directly to the microcontroller
  • 0 ~ 5V analog output voltage, the higher the concentration the higher the voltage
  • Has a high sensitivity and good selectivity to ethanol vapor
  • Has a long life and reliable stability
  • Rapid response recovery characteristics


  • Operating Voltage: DC3-5V
  • Response Time: ≤10s (70% Response)
  • Recovery Time: ≤30s (70% Response)
  • Heating Resistance: 31Ω±3Ω
  • Heating Current: ≤180mA
  • Heating Voltage: 5V±0.2V
  • Heating Power: ≤900mW
  • Detect Voltage: ≤15V
  • Ambient Temperature: -10℃ to 65℃, Humidity: ≤95%RH
  • Storage Conditions: Temperature: -20℃-70℃, Humidity:≤ 70%RH

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