High sensitivity to alcohol and small sensitivity to Benzine. Structure and configuration of MQ-3 gas sensor is shown as Fig. .. You may download the module schematic as well as the manufacturer datasheet for the sensor from each gas. Downloads. MQ3 Sensor DatasheetLM Datasheet. This module is made using Alcohol Gas Sensor MQ3. It is a low cost semiconductor sensor which can . Structure. Gas sensitive semiconductor material is a mini bead type and a heater coil and electrode wire are embedded in the element. The sensing element is.

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Alcohol Sensor Module – MQ3

In this example, the sensor is connected to A0 pin. Please note that the best preheat time for the sensor is above 24 hours.

Expose the sensor to any one of the gas listed above. Tip More details about Grove modules please refer to Grove System. Or submit the issue into our forum. Connect this module to mq3 alcohol sensor datasheet A0 port of Base Shield. The sensitivity of the sensor can be adjusted by using the potentiometer.


Due to its high sensitivity and fast response time, measurements can be taken as mq3 alcohol sensor datasheet as possible.

Replace the R0 below with value of R0 tested above. However, we can’t acohol a formula because the relation between ratio and concentration is nonlinear. This needs to be connected to any mq3 alcohol sensor datasheet Analog socket in Grove Base Shield.

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It may vary based on change in temperature or humidity. This is an Analog output sensor. Approximation Resources Tech Support. We only provide software library or code examples for Mq3 alcohol sensor datasheet platform in most cases. Sensitivity can be adjusted by varying the potentiometer.

For detailed information about the MQ-3 sensor, please refer to the data-sheet provided in Resources section. The voltage read from the sensor is displayed. More details about Grove modules please refer to Grove System.

Alcohol Sensor Module – MQ3 [] : Sunrom Electronics/Technologies

The examples used in this tutorial makes uses of A0 analog pin. The output voltage from the Gas sensor increases when the concentration of gas increases. As per the data-sheet of the MQ3 sensors, these equations are tested for standard conditions and are not calibrated. If your project is aimed at obtaining the gas concentration at a very precise level, then we mq3 alcohol sensor datasheet not recommend ssnsor gas sensor.


According to the figure, we can see that the minimum alcohoo we can test is mq3 alcohol sensor datasheet.

Please do not hesitate to contact techsupport seeed. The detection of certain components in the air usually requires a more precise and costly instrument, which cannot be done with a single gas sensor.

This examples demonstrates a way to know the approximate concentration of Gas. It is possible to connect the Grove module to Arduino directly by using datawheet wires by using the connection as shown in the table below:. Hence, users have to write their own software library.

Note Mq3 alcohol sensor datasheet sensor value only reflects the approximated trend of gas concentration in a permissible error range, it DOES NOT represent the exact gas concentration.