Capillary-reference electrode

US4366040A · kind A · utility

Assignee

• Hans List · AT

Inventors

• Hermann Marsoner · St. Johann in Tirol, AT
• Christoph Ritter · Sorocaba, BR

Key dates

• Filing date: Sep 9, 1981
• Grant date: Dec 28, 1982
• Expiry date: Sep 9, 2001

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N27/28
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

In a capillary reference electrode with a capillary body which comprises a measuring chamber connected through an electrolytic bridge to a test sample which is adapted to be introduced into a capillary bore, the inlet orifice for the electrolyte is arranged at a point of the measuring chamber which is in a low position when the element is installed and the outlet orifice is arranged at a high position of the measuring chamber. The electrolytic bridge is formed through a communicating passage which has a substantially conical narrow end adjacent to the capillary bore with a very fine communication bore leading to the capillary bore. The resulting economy in electrolyte-consumption and absence of sensitivity in respect of potentially occuring air bubbles are further improved by providing the said communication bore with a substantially annular cross section.