Transducer for measuring particles suspended in a fluid

Details Transducer for measuring particles suspended in a fluid Transducer for measuring particles suspended in a fluid

1982-01-15

1985-01-01

Strecker, Gerard R.

Electricity: measuring and testing

Determining nonelectric properties by measuring electric...

324 714, G01N 1502, G01N 2707

Patent

active

044917864

ABSTRACT:
A transducer for measuring particles suspended in a fluid is disclosed. The transducer includes an elongated tubular member having a particle-free fluid conducting channel and an aperture for permitting the flow of a particle containing fluid into the fluid conducting channel. The size of the particles is measured by measuring the impedance variation of the particle containing fluid as it passes through the aperture. Spurious variations of the impedance caused by reentry of the particles into the region about the aperture is prevented by spacing the wall of the channel opposite the aperture so that the particle containing fluid impinges thereon after passing through the aperture and so that the particle-free fluid transports the particles away from the aperture before the particles reenter the region about the aperture.

REFERENCES:
patent: Re28558 (1975-09-01), Hogg
patent: 3588053 (1971-06-01), Rothermel
patent: 3902115 (1975-08-01), Hogg et al.
patent: 3982182 (1976-09-01), Hogg
patent: 4001678 (1977-01-01), Berg
patent: 4014611 (1977-03-01), Simpson et al.
patent: 4136970 (1979-01-01), Cabrera et al.
patent: 4140966 (1979-02-01), Godin et al.
patent: 4290011 (1981-09-01), Berg et al.

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