Patent · US Expired

Device for measuring the concentrations in a measuring liquid

US6624637B1 · kind B1 · utility

167Cited by

26References

12Claims

0Family size

Assignee

Endress+Hauser Conducta Gesellschaft fuer Mess- und Regeltechnik mbH + Co. KG · DE

Inventor

Torsten Pechstein · Radebeul, DE

Key dates

Filing date	Sep 13, 2001
Grant date	Sep 23, 2003
Priority date	—
Expiry date	Sep 13, 2021

Classification

Technology area (CPC G)Physics
CPC primaryG01N27/4148
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

The invention relates to a device for measuring the concentration of ions, notably of hydrogen ions, in a measuring liquid using at least one ion-sensitive field effect transistor which is integrated into an electric circuit within the device in such a way that said circuit emits an output signal which serves as measure of the ion concentration in the measuring liquid. To provide a circuit which is as simple as possible and in particular comprises as few components as possible, the invention provides for the at least one pH-ISFET to be bridge-connected with at least three resistors.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.