Dräger Safety Ag&co. Kgaa

Theodor Kater

Burkhard Stock

A breath alcohol measuring device is provided with a pressure sensor () for detecting a signal representative of the breathing air flow and with an electrochemical sensor () for detecting a signal representative of the alcohol content in the breathing air and with evaluating means for processing the signals and for determining the breath alcohol concentration. Such a breath alcohol measuring device has a simple design and high measuring accuracy. The pressure sensor () and the electrochemical sensor () are connected for this purpose with a delta-sigma analog-digital converter (), which converts the sensor signals directly into digital measured values for determining the alcohol concentration. The pre-amplifiers needed hitherto become unnecessary as a result, which has a number of advantages.

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Lübeck, Germany

Theodor Kater