Electricity: measuring and testing – Determining nonelectric properties by measuring electric... – Erosion
Patent
1977-08-01
1979-06-05
Strecker, Gerard R.
Electricity: measuring and testing
Determining nonelectric properties by measuring electric...
Erosion
G01N 2707
Patent
active
041574982
ABSTRACT:
An improved flow-through type particle analyzing apparatus utilizing multiple electrodes to produce an electrical pulse upon sensing a particle passing through an aperture is provided with a well-shaped liquid sample receiving receptacle or reservoir which is positioned over said aperture and comprises an orifice electrode, made at least in part of a conductive material such as metal. The construction minimizes the sample volume required to properly wet and make electrical contact with the orifice electrode, and it also minimizes the flow path of aperture current thereby correspondingly minimizing electrical noise.
In a preferred embodiment means are incorporated for cleaning the particle analyzing apparatus in the immediate vicinity of the aperture, thereby minimizing the blockage and avoiding the necessity of dismantling the apparatus for cleaning.
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patent: 3714565 (1973-01-01), Coulter et al.
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patent: 3924180 (1975-12-01), Salzman et al.
patent: 3939409 (1976-02-01), Hogg
patent: 4070617 (1978-01-01), Kachel et al.
Coe Roger N.
Miles Laboratories Inc.
Strecker Gerard R.
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