This is an Arduino - compatible alcohol sensor module from DFRobot. It has a measuring range of 0 - 5ppm and supports I2C and UART outputs. Ideal for quickly and accurately detecting alcohol gas concentration in the air, it's great for small - scale alcohol concentration measurement in breathalyzers, smart vehicles, etc. Based on electrochemistry, it's factory - calibrated, with strong anti - interference, high stability and sensitivity, and a service life of over 2 years. The module offers a 0.01ppm (10ppb) resolution and can handle 3.3 - 5.5V wide - range voltage input. It works well with popular controllers like Arduino, ESP32, and Raspberry Pi. With the user - friendly Gravity interface and our sample program, you can easily build your own alcohol concentration detector.
Using this alcohol sensor is a breeze. First, connect the sensor to your controller (like Arduino, ESP32, or Raspberry Pi) using the Gravity - 4pin I2C Cable provided in the shipping list. Make sure the operating voltage is within 3.3 - 5.5V DC. Let the sensor preheat for no more than 3 minutes before use. When measuring, it'll give you results in less than 60 seconds. After use, it'll recover in less than 60 seconds. Keep in mind the operating temperature should be between - 20 and 50℃, and the humidity between 15 - 90%RH without condensation. Store it at 0 - 25℃. If there are interfering gases like benzene, toluene, acetic acid, hydrogen sulfide, or carbon monoxide around, the reading might be affected. For maintenance, there's not much to do, but make sure to keep it clean and dry. The sensor has a service life of over 2 years in the air, so you can use it with confidence for a long time.
