Apparatus for measuring foreign substance content in flowing liq

Details Apparatus for measuring foreign substance content in flowing liq Apparatus for measuring foreign substance content in flowing liq

1987-12-01

1990-06-05

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356440, G01N 1506

Patent

active

049316605

ABSTRACT:
In an apparatus for determining the concentration of foreign substances in a stream of water, a liquid stream is derived from lines preceding and following the pipeline block for the process and each is pumped into a cell, a radiation source being associated with each of the cells, whose beams penetrate the cells and are delivered both to a first detector and to a second detector. A beam filter is placed in front of each of the detectors and divides the beams into two beams of different wavelengths. Between the beam source and the two cells a revolving chopper wheel is disposed which alternately deflects the beams of the radiation source into one and the other cell, while the electrical signals of the detectors are compared with one another by an electrical circuit and processed to an identifying signal.

REFERENCES:
patent: 3535044 (1970-10-01), Seward
patent: 3588496 (1971-06-01), Snowman
patent: 4176963 (1979-12-01), Fabinski et al.
patent: 4591721 (1986-05-01), Wong

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