Light transmission type powder and granular material measuring a

Details Light transmission type powder and granular material measuring a Light transmission type powder and granular material measuring a

1998-09-25

2000-12-05

Raevis, Robert

Measuring and testing

Instrument proving or calibrating

Gas or liquid analyzer

73 188, G01N 100

Patent

active

061550965

ABSTRACT:
A light transmission powder and granular material measuring apparatus for a continuous production line assembly is provided. A conduit line is capable of being connected to the production line to provide an alternative flow path for the powder and/or granular material. A light transmission cell is mounted in the conduit and a measurement apparatus is provided for measuring the light as it passes through the light transmission cell. A valve member can interconnect the conduit to the production line to control the flow of powder and/or granular material, whereby a measurement can be made when the valve is activated to permit the flow of powder and/or granular material to provide an accurate measurement, and also a measurement can be made as a reference measurement during a calibration cycle when the valve is activated to stop the flow of powder and/or granular material. The light transmission powder and/or granular material measuring apparatus can be provided as a modular unit for mounting in a continuous production line and can be automatically controlled to periodically calibrate its measurements.

REFERENCES:
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patent: 3867835 (1975-02-01), Button
patent: 3885162 (1975-05-01), Geertz
patent: 3994601 (1976-11-01), Brugger
patent: 3997271 (1976-12-01), Brugger et al.
patent: 4384925 (1983-05-01), Stetter et al.
patent: 5261285 (1993-11-01), Tokoyama
patent: 5421188 (1995-06-01), Sager
patent: 5597949 (1997-01-01), Kalotay
patent: 5648605 (1997-07-01), Takahashi

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