Electricity: measuring and testing – Determining nonelectric properties by measuring electric... – Superconductors
Patent
1981-04-27
1983-05-24
Tokar, Michael J.
Electricity: measuring and testing
Determining nonelectric properties by measuring electric...
Superconductors
357 25, 204416, G01N 2700
Patent
active
043852742
ABSTRACT:
An electrical circuitry for use in the measurement of the activity of ions in an electrolyte solution carried out by the use of an ion-sensitive field-effect transistor transducer having a gate or ion sensitive layer, a source and a drain. The measurement is carried out by adjusting the drain current flowing through the field-effect transistor to a predetermined value such that the temperature dependency of the electroconductivity of the channel of the transistor becomes equal to the sum of the temperature dependency of the potential at an interface between a reference electrode and the electrolyte solution and the temperature dependency of the potential at an interface between the ion-sensitive layer and the electrolyte solution.
REFERENCES:
patent: 4269682 (1981-05-01), Yano et al.
Shibatani Kyoichiro
Shimada Kiyoo
Yano Makoto
Yoshimochi Hayami
Kuraray Co. Ltd.
O'Shea Kevin D.
Tokar Michael J.
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