Transmissometer having solid state light source
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United States of America Patent
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Jun 26, 1990
Grant Date -
N/A
app pub date -
Aug 22, 1988
filing date -
Aug 22, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An improved transmissometer and optical assembly therefor contains a solid state light source preferably a light emitting diode. The ligh source emits a low level light beam that is split, part of which is passed through a gaseous sample then directed to a detector while the otehr part is directed to a second detector. Electronic components are provided to use signals from the detectors to control the light source and determine opacity of the sample.
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