Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1991-09-03
1993-02-09
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250573, 250301, 356442, G01N 1506
Patent
active
051855330
ABSTRACT:
Method and apparatus for determining accumulated film thickness at the inside diameter of a main stream conduit conducting a main stream of a flowing fluid by employing:
REFERENCES:
patent: 3731091 (1973-05-01), Rosso et al.
patent: 4015134 (1977-03-01), Sturm
patent: 4896047 (1990-01-01), Weaver et al.
Banks Rodney H.
Wetegrove Robert J.
Nalco Chemical Company
Nelms David C.
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