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Breathalyser test

Breathalyser test

T662/0026

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Credit

ADAM HART-DAVIS / SCIENCE PHOTO LIBRARY ADAM HART-DAVIS / SCIENCE PHOTO LIBRARY

Caption

Breathalyser. Driver's view of a policeman reaching into a car with a breathalyser in his outstretched hand. Electronic breathalysers use alcohol to produce an electric current. Breath from the tube is drawn into a battery-like cell, where it touches a platinum electrode. The platinum causes any alcohol present to oxidise into acetic acid, releasing electrons as it does so. These electrons flow to another electrode, producing a current. The strength of the current is used to estimate out how much alcohol the subject has drunk.

Release details

Model release available. Property release not required.

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