This Arduino Alcohol Sensor with an MQ3 probe is perfect for breathalyzers. It has high sensitivity to alcohol and low sensitivity to benzine. You can adjust the sensitivity using the potentiometer, and the output is proportional to the gas density. Just use analog reading to get data from it. To make it super easy to use, it features a Gravity Interface for plug - and - play. The Arduino IO expansion shield is the ideal partner when connecting it to your Arduino microcontrollers. It comes with a standard assembling structure, easily recognizable sensor interfaces, icons to show sensor functions, high - quality connectors and potentiometer, and an immersion gold surface. Specifications include a 5V power supply, analog interface, fast response, high sensitivity, long - lasting stability, and a simple drive circuit. It measures 36.4x26.6mm (1.43'x1.05'). You'll also get relevant documents like the Wiki Doc, Schematic, and MQ - 3 datasheet. The shipping list includes one Arduino Alcohol Sensor (MQ3) and one Analog Cable.
Using this Arduino Alcohol Sensor is easy. First, connect it to your Arduino microcontroller with the included analog cable and the Arduino IO expansion shield. Then, you can power it up with a 5V power supply. When using it, you can adjust the sensitivity with the potentiometer according to your needs. To read the data, simply use analog reading. As for maintenance, keep it in a dry and clean place. Avoid exposing it to extreme temperatures or humidity. If you need more technical details, check the included Wiki Doc, Schematic, and MQ - 3 datasheet. Also, handle the sensor gently to prevent damage to the high - quality connectors and potentiometer.
