Hematology cell counting apparatus incorporating multiple transd

Details Hematology cell counting apparatus incorporating multiple transd Hematology cell counting apparatus incorporating multiple transd

1979-07-12

1981-10-20

Tokar, Michael J.

Electricity: measuring and testing

Determining nonelectric properties by measuring electric...

Erosion

G01N 2700

Patent

active

042963737

ABSTRACT:
In particle counting apparatus such as a hematology parameter measurement apparatus for performing multiple measurements on one blood sample, first and second impedance transducers, each including inner and outer electrodes, are provided for selective hydraulic connection to a probe head including one set of pressure ports and a further inner electrode. The first and second transducers are respectively immersed in first and second dilutions of the sample. Measurements on each dilution are made in a conventional manner. The inner electrodes are connected in parallel as are the outer electrodes so that small liquid passageways may be provided between the transducers and the probe head while maintaining a low impedance in the liquid path. Means are provided for selecting the sequence of operations and are provided to increase the throughput of samples for which multiple measurements are made.

REFERENCES:
patent: 3921066 (1975-11-01), Angel
patent: 4167038 (1979-09-01), Hennessy

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