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Probing volatile liquid through an electrical sensor with up gradation to a breathalyzer for drunken drivers

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We report a volatile liquid detector by engaging metal oxide sensor, which is further assisted by an Arduino kit to develop a prototype of alcohol detection. We have used ethanol as the main volatile liquid to design the prototype. To verify the most selective nature of the metal oxide sensor towards alcohol, we have compared with Methanol, Isopropyl alcohol, Acetone and Ammonia along with Ethanol. The proposed sensing device has been found to be highly sensitive towards ethanol with an excellent linearity closing to unity. With a working domain of ~ 230–800 ppm, the probe renders good degree of reproducibility. Through a little up scaling, the proposed device can be used as a transducer to reduce the speed of a running car when the exhale of driver exceeds dangerous concentration of alcohol.

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Correspondence to Rajib Biswas.

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Biswas, R., Saha, D. Probing volatile liquid through an electrical sensor with up gradation to a breathalyzer for drunken drivers. Appl. Phys. A 126, 313 (2020).

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