Alcohol Gas Sensor - MQ-3

The Sparkfun Alcohol Gas Sensor - MQ-3 is a versatile tool designed to detect alcohol concentration. With its high sensitivity and rapid response time, it functions similarly to a standard breathalyzer. The sensor delivers an analog resistive output based on the alcohol concentration detected, and setting it up is a breeze. All it requires is a simple drive circuit, powered by one resistor, and an interface that could be a 0-3.3V ADC.

Not only does this sensor offer high sensitivity and quick response times, but its operation is also incredibly straightforward. The only requirements are to power the heater coil with 5V, add a load resistance, and connect the output to an ADC. This simplicity makes it a practical choice for various applications.

The Sparkfun Alcohol Gas Sensor - MQ-3 comes equipped with several notable features. It can operate on a 5V DC or AC circuit and requires a heater voltage. It can function in temperatures ranging from -10 to 70 degrees Celsius. The heater consumption is less than 750mW, and the sensor boasts a compact size with a diameter of 16.8mm and a height of 9.3mm without pins.

For those looking to further explore the capabilities of this sensor, numerous resources are available. These include a comprehensive datasheet, an Arduino tutorial in Portuguese, a wiring example, and even tutorials on building an Arduino breathalyzer. These resources can provide invaluable insights into the sensor's operation and potential applications.

Whether you're a hobbyist looking to experiment, or a professional seeking a reliable alcohol sensor, the Sparkfun Alcohol Gas Sensor - MQ-3 is a solid choice. With its high sensitivity, quick response times, and easy setup, it offers a blend of performance and convenience that sets it apart.