Oil concentration detector

Details Oil concentration detector Oil concentration detector

1978-08-11

1980-05-06

McGraw, Vincent P.

Optics: measuring and testing

Oil testing

250574, 250575, 356338, 356 73, G01N 3328, G01N 2100, G01N 2126

Patent

active

042014719

ABSTRACT:
A system for determining the concentration of oil in a mixture of oil and water including an aligned photocell and a displaced photocell spaced therefrom to receive direct and reflected and/or refracted light through a scatter cell from a laser. A logarithmic amplifier is connected from the aligned photocell because a logarithm of the output thereof is a linear function. The displaced photocell output is essentially linear over a typical range above 200 parts per million (ppm). The output of the logarithmic amplifier is essentially linear below about 200 ppm. The linear portion of each output is combined by a switch when the logarithmic amplifier output passes through a selected threshold level.

REFERENCES:
patent: 3810695 (1974-05-01), Shea

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