Radiant energy – Invisible radiant energy responsive electric signalling – Flow metering
Patent
1988-06-03
1990-03-27
Hannaher, Constantine
Radiant energy
Invisible radiant energy responsive electric signalling
Flow metering
250341, 250373, 250431, G01F 2328, G01N 2159
Patent
active
049123327
ABSTRACT:
A non-destructive method for the early detection of the formation of orga deposits or a biofilm on the internal surface of a conduit through which a fluid passes comprises allowing the fluid to flow through a conduit, passing a light beam, e.g., IR or UV light, through the fluid and the deposits in a direction transversal to the surface thereof, detecting and measuring the transmitted portion of the light beam after it has emerged from the fluid and the deposits, conducting these measurements at least twice at a set time interval, the first time before any materials deposit, and calculating % variation absorbed light during the time interval, which value is proportional to the organic materials or biofilm deposited and a method of removing at least a portion of organic deposits or a biofilm deposited on the internal surface of a conduit through which a fluid flows comprises allowing the fluid to flow through a conduit having a deposited organic layer or biofilm, passing a light beam, e.g., IR or UV light, through the fluid and the deposited material in a direction transversal to the surface thereof, detecting and measuring the transmitted portion of the light beam after emerging from the fluid and the deposits, and adding deposit removing means to the flowing fluid to remove at least a portion of the organic deposit or biofilm.
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Bakke Rune
Characklis William G.
Siebel Maarten A.
Hannaher Constantine
Research and Development Institute, Inc. at Montana State Univer
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