Apparatus for measuring electrolytes including optical measureme

Details Apparatus for measuring electrolytes including optical measureme Apparatus for measuring electrolytes including optical measureme

1989-04-12

1992-07-28

Wieder, Kenneth

Electricity: measuring and testing

Determining nonelectric properties by measuring electric...

324425, 324 96, 422 681, 204416, G01N 2750

Patent

active

051343592

ABSTRACT:
Apparatus for measuring electrolyte concentrations in fluid samples. The apparatus includes an ion selective electrode capable of generating a voltage differential having a magnitude related to the concentration of the corresponding electrolyte in the sample. A voltage to optical transducer circuit is provided to convert the voltage differentials to a digital code and then to an optical signal which is related to the concentration of the electrolytes. The optical signals are suitable for detection by conventional optical detector apparatus of assay instruments. A passive duplex transfer is utilized to simultaneously read one optical signal while transferring the next bit of the digital code. The duplex transfer configuration also makes novel use of the photodetection properties of an LED.

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patent: 4330870 (1982-05-01), Arends
patent: 4502937 (1985-03-01), Yagi
patent: 4797609 (1989-01-01), Yang
Schultz et al, Two-Dimensional Centrifugation for Desk-Top Clinical Chemistry, Sep. 1985, pp. 1457-1463.

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