MQ-3 Alcohol Sensor Module


MQ-3 Alcohol Sensor Module.

Pack of 1-piece/lot

Image is for package illustration purpose only. Refer to product specs for detail.

In stock

SKU: SSR1000 Category:


MQ-3 gas sensor has high sensitivity to alcohol, and has good resistance to disturbances 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. Sensitive material of MQ-3 gas sensor is SnO2, which with lower conductivity in clean air. When the target alcohol gas exists, sensor’s conductivity is proportional to the gas concentration.


  • Power Supply: 5VDC
  • Model No: MQ-3.
  • Heater voltage: 5±0.2V.
  • Loop voltage: ≤24V (DC)
  • Load resistance: Adjustable.
  • Heating Resistance: 31Ω±3Ω (Room temperature).
  • Surface thermal resistance: 2Kohm-20Kohm (0.4mg/L alcohol).
  • Sensitivity: Rs (in air)/Rs (0.4mg/L alcohol) ≥
  • Weight 8.5-g.

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Weight 0.05 kg

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