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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This needs to be connected to any one Analog socket in Grove Base Shield. The output mqq3 from the Gas sensor increases when the concentration of gas increases.

MQ3 Alcohol Gas Sensor

It may vary based on change in temperature or humidity. This is an Analog output sensor.

In this example, the sensor is connected to A0 pin. As per the data-sheet of the MQ3 sensors, these equations are tested for standard conditions and are not calibrated.

Note The sensor value only reflects the approximated trend of gas concentration in mq3 alcohol sensor datasheet permissible error range, it DOES NOT represent the exact gas concentration. According to the figure, we can see that the minimum concentration we can test is 0. More details about Grove modules please refer to Grove System. However, we can’t provide a formula because mq3 alcohol sensor datasheet relation between ratio and concentration is nonlinear.

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Expose the sensor ma3 any one of the gas listed above. For detailed information about the MQ-3 sensor, please refer to the data-sheet provided in Resources section.

MQ3 Alcohol Gas Sensor

The detection of certain components in alcoyol air usually requires a more precise and costly instrument, which cannot be done with a mq3 alcohol sensor datasheet gas sensor. The examples used in this tutorial makes uses of A0 analog pin. This examples demonstrates a way to know the approximate concentration of Gas.

It is possible to connect the Grove module mq3 alcohol sensor datasheet Arduino directly by using jumper wires by using the connection as shown in the table below:.

Tip More details about Grove modules please refer to Grove System. Please note that the best preheat time for the sensor is above 24 hours.

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Connect this module to the A0 mq3 alcohol sensor datasheet of Base Shield. Due to its high sensitivity and fast response time, measurements can be taken as soon as possible. Replace the R0 below with value of R0 tested above. Or submit the issue into our forum. We only provide software library or code examples for Arduino platform in most cases.

Sensitivity can be adjusted by varying the potentiometer. The sensitivity of the sensor can be adjusted by using the potentiometer. Hence, users have mq3 alcohol sensor datasheet write their own software library. If your project is aimed at obtaining the gas concentration at a very precise level, then we do not recommend this gas sensor. Approximation Resources Tech Support. The voltage read from the sensor is displayed.