Winsen MQ303B Alcohol Gas Sensor Module - Semiconductor Metal Encapsulation
The Winsen MQ303B is a semiconductor-type alcohol gas sensor module designed for portable breathalyzer applications and air quality monitoring. It provides both analog and digital output signals, making it compatible with 5V microcontrollers like Arduino, ESP32, and Raspberry Pi for easy integration into detection systems.
Features
- Semiconductor sensing element with high sensitivity to alcohol vapor (C2H5OH)
- Dual analog and digital output modes for flexible system integration
- Compact metal encapsulation for durability and stable performance
- Low power heater circuit with ≤6V DC operating voltage
- Designed for portable breathalyzer and alcohol detection applications
Out of stock
The MQ303B alcohol sensor utilizes a tin dioxide (SnO2) semiconductor sensing layer. In clean air, the sensor’s conductivity is low. When alcohol vapor is present, the gas molecules adsorb onto the sensor surface, increasing its conductivity proportionally to the gas concentration. This change is converted into a corresponding output signal via an external load resistor circuit.
The module features a robust metal encapsulation that protects the sensing element and ensures consistent performance. It operates with a simple drive circuit, requiring a heater voltage of ≤6V DC to maintain the optimal sensing temperature. The sensor exhibits a quick response and recovery time, making it suitable for real-time monitoring applications.
Additional Information
| Weight | 0.01 kg |
|---|---|
| Dimensions | 2 × 2 × 2 cm |
