Karl P W Wolf: Method of and apparatus for testing breath alcohol. Alcotek, Polster Polster and Lucchesi, September 13, 1988: US04770026 (25 worldwide citation)

Apparatus for measuring breath alcohol content by oxidizing breath alcohol in a fuel cell and utilizing substantially all of the electrons produced by said oxidation as a measure of the amount of alcohol contained in the sample. A working embodiment of the invention includes a resistor across termin ...