Method for measuring the radiation transmitting properties of a

Details Method for measuring the radiation transmitting properties of a Method for measuring the radiation transmitting properties of a

1983-03-07

1984-05-29

Arnold, Bruce Y.

Optics: measuring and testing

For light transmission or absorption

Of fluent material

356246, G01N 2103, G01N 2115

Patent

active

044511523

ABSTRACT:
There is disclosed a method for sampling and examining a fluid from a tank or flow line to determine density or turbidity, including a sampling chamber attached to the tank or line with a piston in a chamber. The piston is provided with a sealing ring which circumscribes one end of the piston and which provides a fluid-tight seal within the chamber so that moving the piston away from the tank or line pulls a sample into the chamber. The sealing ring comprises a main body portion which circumscribes the piston and is in contact therewith but which is not in sealing engagement with the chamber. Extending outwardly from the main body portion of the sealing ring and integral therewith is a frusto-conical skirt. The outermost edge of the frusto-conical skirt is in sealing contact with the cylinder. A light source is provided to transmit light into the sample and a photodetector is provided to detect light from the interior of the chamber. The photodetector generates an electrical signal proportional to the light transmissivity of the fluid and the signal is analyzed to determine turbidity. The chamber can be provided with transparent walls, or can be totally transparent, to simplify light transmission. The piston, after the measuring process, returns the sample to the tank or line and simultaneously wipes the interior of the chamber clean.

REFERENCES:
patent: 2315944 (1943-04-01), Dick
patent: 3572952 (1971-03-01), Anthon
patent: 4245914 (1981-01-01), Clack

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