Apparatus for measuring particle size distribution by making use

Details Apparatus for measuring particle size distribution by making use Apparatus for measuring particle size distribution by making use

1990-12-17

1992-04-14

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250214C, 356336, G01N 1506

Patent

active

051050935

ABSTRACT:
Apparatus for measuring a particle size distribution by analyzing the intensity distribution of light scattered by particles suspended in a medium fluid. The apparatus is provided with not only a photosensor assembly for detecting forward scattered light but also that for detecting sideward and backward scattered light for the purpose of increasing the precision of measurement. Both the photosensor assemblies are temperature-monitored to prevent erroneous measurement due to small temperature-dependent zero-level shifts of photosensors used in the photosensor assemblies. If temperature variations of or a temperature difference between the assemblies exceeds a predetermined value, an alarm signal is generated with the measurement interrupted automatically.

REFERENCES:
patent: 4380392 (1983-04-01), Karabegov et al.
patent: 4781460 (1988-11-01), Bott
patent: 4796995 (1989-01-01), Salzman et al.
patent: 4842406 (1989-06-01), von Bargen
patent: 4893929 (1990-01-01), Miyamoto

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