Method of and apparatus for detecting the presence of vapor and/or smoke in the outgoing air of a device for heating materials
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United States of America Patent
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Jun 15, 1993
Issued Date -
N/A
app pub date -
Oct 1, 1991
filing date -
Feb 6, 1990
priority date (Note) -
Expired
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Abstract
A method of and apparatus for differentiated measurement of smoke and/or vapor in the outgoing air of a device, especially a microwave unit for disinfection and sterilization of goods includes the steps of deriving a signal commensurate with the presence of vapor in accordance with the intensity increase of refracted and/or reflected light, and deriving a signal commensurate with the presence of smoke in accordance with the pulsed intensity decrease of light passing through the outgoing air.
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