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What is the maximum output voltage that the MQ2 Gas Sensor can put out on its analog output pin?

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What is the maximum output voltage that the MQ2 Gas Sensor can put out on its analog output pin?

(a) 1V

(b) 140V

(c) 5V

(d) 10V

This question was addressed to me in my homework.

I would like to ask this question from MQ2 Gas Sensor Module topic in section Interfacing of Sensors, Actuators, and Other Modules of Arduino

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Right option is (c) 5V

The explanation is: The maximum output voltage of the MQ2 Gas Sensor is 5V. Any PPM concentrations within that limit can be detected with accuracy by the sensor. However, one can detect higher or lower PPM concentrations to a certain degree by adjusting the potentiometer.

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