MQ-3 Alcohol Sensor

TThe main chip: LM393, MQ-3 gas sensor

The operating voltage: DC3-5V
IV characteristics:
          1, with the signal output instructions;
          2, the dual signal output (analog output, and TTL level output);
          3, TTL output valid signal is low, can be directly connected to Microcontroller;
          4, 0 ~ 5V analog output voltage, the higher the voltage the higher the concentration;
          5, the ethanol vapor with high sensitivity and good selectivity;
          6, with a long service life and reliable stability;
          7, rapid response and recovery characteristics;