Principles and interfacing of resistive gas sensors
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2020-01-01
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Perea Martins, J. E.M. [UNESP]
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This work presents a sequence to introduce resistive gas sensors in the classroom. It explains the physical principle of the metal oxide semiconductor sensors and exemplifies its real interfacing through the sensor model MQ-2. Besides, it also presents the design of two electronic systems to indicate the level of alcohol concentration in the air, which are relatively simple and aim to motivate students through practical activities.
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Physics Education, v. 55, n. 3, 2020.