MQ-3 Alcohol Sensor

MQ-3 alcohol sensor

The MQ-3 alcohol sensor is capable of detecting the presence of alcohol gas in a range of concentrations suitable for creating alcohol meters, typically between 0.04mg/L and 4mg/L. Similar to other MQ sensors, this sensor provides an analog voltage output that varies based on the density of the detected gas. It is a sensor suitable for reading the gas range commonly used in alcohol meters.

To operate the sensor effectively, you should provide 5V to the H pins to ensure that the sensor heats up adequately for accurate measurements. Applying 5V voltage to pins A or B will result in the sensor providing analog voltage output through its other pins. You can adjust the sensor's sensitivity by changing the resistor value connected between the sensor's output pin and ground. The specific resistor value may vary depending on your application, and you can find detailed calculations in the datasheet. As a starting point, you can use a 200 kΩ resistor.

MQ-3 Alcohol Gas Sensor Features:

• Operating Temperature: -10°C to 50°C
• Operating Voltage: 5V
• Current Consumption: 150 mA

You can purchase the competitive and affordable MQ-3 Alcohol Gas Sensor from SAMM Market in the Gas and Water Sensors category, with the advantage of same-day shipping and fast delivery.