TOBACCO SMOKE DETECTOR, HAZARD DETECTOR, AND METHOD OF DISTINGUISHING TOBACCO SMOKE FROM FIRE SMOKE
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United States of America Patent
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Issued Date -
Dec 11, 2014
app pub date -
Jun 10, 2014
filing date -
Jun 10, 2013
priority date (Note) -
Abandoned
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Abstract
A tobacco smoke detector has a gas-sensitive semiconductor sensor device (in particular, GasFET sensor) with a first gas-sensitive layer which reacts to tobacco smoke and a second gas-sensitive layer which reacts to fire products. An evaluation unit (e.g. microchip) analyzes the signals supplied by the first and the second gas-sensitive layer and determines whether tobacco smoke is present. Optionally, the tobacco smoke detector contains an interface for providing a connection using signals or data technology to a hazard detector and/or a hazard control unit and/or an output device, in particular for transmitting information as to whether tobacco smoke is present. Optionally, the tobacco smoke detector can be operationally integrated into a conventional hazard detector (e.g. fire alarm).
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