G - Physics – 01 – N
Patent
G - Physics
01
N
137/137, 324/26,
G01N 27/10 (2006.01) G01N 1/00 (2006.01) G01N 15/12 (2006.01)
Patent
CA 2009160
A particle detector for detecting particles of blood components in an electrolyte employs a minute hole through which a fixed quantity of the material is drawn. Electrodes inside and outside the detector pass an electric current through the minute hole. When a particle passes through the hole, it partially blocks the hole, whereby a sharp change is experienced in the amount of current passing through the electrolyte. A syringe fluid path in the detector enters the fluid path for the test fluid at right angles thereto. The inside electrode is disposed in the syringe fluid path near its junction with the fluid path for the test fluid. A colorimeter is placed in series with the flow of the test fluid to measure the concentration of hemoglobin in the test fluid. Automated control of the particle detector is provided by a plurality of cams driving a corresponding plurality of pistons. One of the pistons serves as a syringe for pumping test fluid during a test and for pumping purge fluid for cleanup prior to the next test. The remaining pistons, with interconnecting chambers, perform valve functions.
Adams Patent & Trademark Agency
Toa Medical Electronics Co. Ltd.
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