Alcohol Gas Sensor MQ-3

Monday, January 31st, 2011 - Sensors/Tranducer

Description Of Alcohol Gas Sensor MQ-3 :

This alcohol sensor is suitable for detecting alcohol concentration on your breath, just like your common breathalyzer. It has a high sensitivity and fast response time. Sensor provides an analog resistive output based on alcohol concentration. The drive circuit is very simple, all it needs is one resistor. A simple interface could be a 0-3.3V ADC. Resistance value of MQ-3 is difference to various kinds and various concentration gases. So,When using this components, sensitivity  adjustment is very necessary. we recommend that you calibrate the detector for 0.4mg/L ( approximately 200ppm ) of Alcohol concentration in air and use value of Load resistancethat( RL) about 200 KΩ(100KΩ to 470 KΩ).

Picture Of Alcohol Gas Sensor MQ-3 :

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Feature Of Alcohol Gas Sensor MQ-3 :

  • High sensitivity to alcohol and small sensitivity to Benzine .
  • Fast response and High sensitivity
  • Stable and long life
  • Simple drive circuit
  • 5V DC or AC circuit
  • Requires heater voltage
  • Operation Temperature: -10 to 70 degrees C
  • Heater consumption: less than 750mW
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