Infrared oil-concentration meter

Details Infrared oil-concentration meter Infrared oil-concentration meter

1995-03-30

1997-09-30

Fields, Carolyn E.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250345, 25033912, G01N 2135, G01N 3326

Patent

active

056728743

ABSTRACT:
An oil concentration meter includes a sample cell for receiving an oil sample that can be irradiated with infrared rays from a light source. A first interference filter having a design wavelength of 3.4 .mu.m is positioned before a measuring detector, while a second interference filter transmitting a band range between 1 .mu.m and 5 .mu.m is positioned in front of a reference detector. A logarithm of the ratio of the reference detector output to the measuring detector output is used for determining the oil concentration in a sample.

REFERENCES:
patent: 2883343 (1959-04-01), Favre et al.
patent: 4101221 (1978-07-01), Schunck et al.
patent: 4204424 (1980-05-01), Walker
patent: 4567366 (1986-01-01), Shinohara
patent: 5124553 (1992-06-01), Hilliard et al.
Japanese Industrial Standard, Fuel Oil, JIS K 2205-1991.

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