RAKwireless RAK12009 WisBlock Winsen MQ-3B Alcohol Gas Sensor

RAKwireless RAK12009 is a focused WisBlock sensor module for detecting alcohol vapor in air. It uses the MQ-3B from Zhengzhou Winsen Electronics, a sensor designed specifically for alcohol gas detection, making it a practical choice when you need alcohol concentration as a measurable signal for logging, alerts, or automation logic.

Integration is straightforward for embedded and IoT projects: the module communicates via I2C with a 7-bit address of 0x54 and provides an alert function to support threshold-based behavior (e.g., “alcohol level rising” → notify, log an event, or trigger ventilation). This is particularly helpful in low-power designs where you prefer event-driven sampling rather than continuous high-rate reading.

Real-world applications include:

Safety and condition monitoring in environments where alcohol vapors may be present (maintenance rooms, storage, lab-adjacent setups).

IoT logging and prototyping to track alcohol vapor trends and correlate them with ventilation or process events.

Automation triggers, such as enabling ventilation or sending alerts when readings exceed a set threshold.

Note: The MQ-3B is intended for alcohol vapor detection within the specified 25–500 ppm range. If you require certified, forensic, or medical-grade accuracy, a calibrated and certified measurement solution is typically required.