Oil mist monitor

Details Oil mist monitor Oil mist monitor

1985-02-25

1987-08-18

Rosenberger, R. A.

Optics: measuring and testing

Oil testing

356435, G01N 2159

Patent

active

046873279

ABSTRACT:
An instrument for measuring opacity of oil mist for lubrication purposes is set forth. In the preferred and illustrated embodiment, the apparatus is preferably installed in a pipe cross, opposing legs of the cross conduct oil mist past the opposite two legs supporting an opacity measuring system. Utilizing a bridge voltage supply to power an amplifier forming a reference voltage for reference diodes, a first photo cell is provided with a reference light from LED created light directed to the reference. A second LED directs light through the oil mist. The quantity of light is measured by a second photo cell reflecting the light absorbence of the sample, and the output of the two measuring devices is determined in a differential amplifier, driving a meter movement. The direct current signal is at a safe current range for use of the transmitter in a hazardous environment and is inversely proportional to the percent transmission of the signal.

REFERENCES:
patent: 3268734 (1966-08-01), Bjorn
patent: 3417250 (1968-12-01), Kadivnik
patent: 3838925 (1974-10-01), Marks
patent: 3847487 (1974-11-01), Boll
patent: 4185278 (1980-01-01), Lintelmann et al.
patent: 4544273 (1985-10-01), Berndt

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