Description OfMQ-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 driveis very simple, all it needs is one resistor. A simple interface could be a 0-3.3V . 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 OfMQ-3 :
Feature OfMQ-3 :
- High sensitivity to alcohol and small sensitivity to Benzine .
- Fast response and High sensitivity
- Stable and long life
- Simple drive
- 5V DC or AC circuit
- Requires heater voltage
- Operation Temperature: -10 to 70 degrees C
- Heater consumption: less than 750mW