Apparatus for measuring electrical conductivity

Details Apparatus for measuring electrical conductivity Apparatus for measuring electrical conductivity

1989-12-26

1992-08-11

Wieder, Kenneth A.

Electricity: measuring and testing

Electrolyte properties

Using a conductivity determining device

324444, 324709, 324713, 324720, G01N 2708, G01R 2722

Patent

active

051382644

ABSTRACT:
An electrical conductivity measuring apparatus for measuring the electrical conductivity of liquid has a plurality of electrodes disposed in the liquid contained in a measuring cell, with an a.c. voltage being applied between the electrodes, thereby measuring the electrical conductivity by measuring a current flowing between the electrodes. The apparatus includes a reference a.c. voltage source including adjustment means for varying the magnitude and phase of the signal current, and is designed to cancel the conductivity of background by adding the current from the reference a.c. voltage source to the current from the electrodes.

REFERENCES:
patent: 3778707 (1973-12-01), Vogel
patent: 3868315 (1975-02-01), Forster et al.
patent: 4513248 (1985-04-01), Miller
patent: 4969363 (1990-11-01), Mochizuki
patent: 5008627 (1991-04-01), Tsutsuta et al.

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