Coaxial differential PH system

Details Coaxial differential PH system Coaxial differential PH system

1978-05-08

1980-04-01

Tokar, M.

Electricity: measuring and testing

Electrolyte properties

Using a ph determining device

G01N 2742

Patent

active

041963830

ABSTRACT:
A circuit for measuring the PH of fluids includes a coaxial symmetrical probe having a PH probe surrounded by a reference probe; the conductor on which the PH signal passes from the probe to the control panel is within a shield to which is applied the PH voltage; and the differential amplifiers which receive and process the PH and reference signals are mounted on a conductive surface to which is applied the PH voltage.

REFERENCES:
patent: Re27668 (1973-06-01), Soltz et al.
patent: 3441490 (1969-04-01), Johansson

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