Method and apparatus for counting particles of particulate...

Details Method and apparatus for counting particles of particulate... Method and apparatus for counting particles of particulate...

G - Physics

06

M

340/124.1

G06M 11/00 (2006.01) A01C 7/20 (2006.01)

Patent

CA 1117200

1. ABSTRACT OF THE DISCLOSURE Infrared or visible light radiation is arranged to traverse substantially the entire cross sectional area of a passageway as a wide, flat beam having a thickness not sub- stantially exceeding the minimum thickness of particles to be counted and a width substantially greater than the thickness, and is detected as a field of radiation of substantially con- stant intensity. When a particle fails by gravity through any portion of the field, the detected change in intensity funct- ions to activate an electronic counter which provides a dir- ect digital readout of the number of particles passing through the field in a given period of time, distance, or area.

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