The MQ-3 sensor is one of the most commonly used sensors in the MQ sensor series. It is a chemiresisotors because sensing is based on the change of resistance of the sensing material when it is exposed to alcohol. 
  • Main chip: LM393, ZYMQ-3 gas detector
  • Working Voltage: DC 5V
  • Current consumption: 150mA
  • With signal output instructions
  • Two-way signal output (TTL level output and analog output)
  • TTL output effectively signal for low level (when the output low level signal lights, can directly connected microcomputer)
  • Analog output 0 ~ 5v voltage, the higher the concentration, the higher the voltage
  • Size: 32 x 20 x 22mm


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