Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1991-03-28
1994-03-22
Hofsass, Jeffrey
Communications: electrical
Condition responsive indicating system
Specific condition
340438, 250573, 250575, 356 70, 356320, 356436, G08B 2100
Patent
active
052968430
ABSTRACT:
A device is provided which passes light of preselected wavelengths through a fluid or vapor to be tested. The light is detected after it has passed through the fluid or vapor. Upon detection, a voltage is created which is proportional in amplitude to the detected light strength for each wavelength of light. These voltages are compared to produce a ratio which represents the condition of the fluid or vapor which is tested. When the ratio is outside of preselected boundaries, control signals are generated which may trigger alarms or otherwise respond to the condition.
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Ciurczak Emil W.
Wohlstein Scott D.
Hofsass Jeffrey
Kinghorn Curtis D.
SD Laboratories, Inc.
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