Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1994-03-07
1996-07-23
Peng, John K.
Communications: electrical
Condition responsive indicating system
Specific condition
340619, 250573, 128DIG13, G08B 17103
Patent
active
055393861
ABSTRACT:
A non-intrusive optical transmission liquid monitoring system that detects bubbles in a transparent liquid flowing through a transparent tubing. The system dynamically compensates for changes in optical transmission efficiency of the monitored liquid and distinguishes between the transition from liquid to air and air to liquid. A system comprising a light transmitter and a light sensitive receiver secured on opposite sides of a transparent tubing. The output of the receiver is fed into a self-referencing and drift compensation circuit. The integrated output is connected to circuitry sensitive to a change in the integrated output and triggers one of two possible alarms to indicate a detected transition from liquid to air, or air to liquid.
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J-KEM Electronics, Inc.
Peng John K.
Wu Daniel J.
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