Optics: measuring and testing – For light transmission or absorption – Of fluent material
Patent
1981-07-31
1984-10-02
Rosenberger, R. A.
Optics: measuring and testing
For light transmission or absorption
Of fluent material
356 38, 356440, G01N 2101
Patent
active
044744722
ABSTRACT:
A measuring system for the detection of particles in a gas flow utilizes a light source, a light detector for receiving light from the light source, and an evaluating circuit connected to the light detector. A hollow body having a longitudinal portion and a side portion which branches off from the longitudinal portion at an angle is provided. One end of the longitudinal portion is open for entry of the gas flow and an end of the side portion is open for exiting of the gas flow. The other end of the longitudinal portion is closed with a cover in which the light source and light detector means are arranged. Particles which might be present in the gas are deposited on inner walls of a bore hole in the cover so as to change detected intensity of the light from the light source which passes through soiled areas at the inner wall of the bore hole.
REFERENCES:
patent: 2489286 (1949-11-01), Grant
patent: 3795025 (1974-03-01), Sadamitsu
Crosse et al., "Instrument for Recording the Dust Nuisance Emitted by Chimneys" Journal of Scientific Instruments, vol. 38 (Jan. 1961), pp. 12-17.
Rosenberger R. A.
Siemens Aktiengesellschaft
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