Ion concentration measuring apparatus

Details Ion concentration measuring apparatus Ion concentration measuring apparatus

1984-12-04

1987-02-03

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Determining nonelectric properties by measuring electric...

Semiconductors for nonelectrical property

324439, 204406, G01N 2702, G01N 2726

Patent

active

046410848

ABSTRACT:
An apparatus for measuring a concentration of a specific ion contained in a test liquid held in a container with the aid of a reference electrode and an ion sensitive field effect transistor having a gate portion selectively sensitive to the specific ion, including a series circuit of a reference resistor and a constant voltage supply source connected across drain and source of the ion sensitive field effect transistor, a potential control circuit having inputs connected across the reference resistor to detect a potential difference across the reference resistor for controlling a source or drain potential of the ion sensitive field effect transistor in such a manner that the potential difference remains at a predetermined value and a voltmeter for measuring the source or drain potential as a measure of the ion concentration.

REFERENCES:
patent: 3648159 (1972-03-01), Stansell et al.
patent: 4332658 (1982-06-01), Tsuboshima
patent: 4385274 (1983-05-01), Shimada et al.
patent: 4444644 (1984-04-01), Hiramoto et al.
patent: 4490216 (1984-12-01), McDonnell

Affiliated with

Also associated with

Rating

Ion concentration measuring apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ion concentration measuring apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ion concentration measuring apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1092852