In-tank electrochemical sensor

US5296123A · kind A · utility

Assignee

• Hughes Aircraft Company · US

Inventors

• Vilambi NRK Reddy · Cranbury, US
• Frank A. Ludwig · Homberg (Efze), DE
• Bruce M. Eliash · Los Angeles, US
• Nguyet H. Phan · Los Angeles, US

Key dates

• Filing date: Sep 16, 1992
• Grant date: Mar 22, 1994
• Expiry date: Sep 16, 2012

Classification

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

Abstract

An electrochemical sensor adapted for use in the electrochemical analysis of liquids. The sensor includes a cell assembly having a liquid flow control chamber, sensing chamber and liquid exit chamber. Liquids to be measured are pumped into the liquid flow control chamber where any turbulence in the liquid is dampened. The non-turbulent liquid is passed from the liquid flow control chamber to the sensing chamber. The sensing chamber includes a working electrode and a counter-electrode. The non-turbulent liquid is passed from the sensing chamber to the liquid exit chamber where it is contacted with a reference electrode. The liquid then exits the sensor. The sensor is well-suited for use in the electrochemical analysis of plating bath solutions where sub-milliampere type AC and DC voltammetric measurements are required in order to generate electrochemical spectra which are indicative of constituents present in the solution.