Fuel cell breath analyzers work through an electrochemical oxidation reaction. When a breath sample containing ethanol passes over the fuel cell electrode, the ethanol is oxidized at the anode and oxygen is reduced at the cathode.
This reaction produces an electrical current directly proportional to the ethanol concentration in the breath sample. Because the reaction is specific to ethanol, fuel cell analyzers are far more accurate than semiconductor devices.
The result: precise, reliable BAC measurements that hold up in court and meet international standards like EN 15964 and NIST requirements.
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