Digital pH sensor and measuring method of a digital pH sensor

US11940409B2 · kind B2 · utility

Assignee

• Endress+Hauser Conducta GmbH+Co. KG · DE

Inventors

• Thomas Wilhelm · Zürich, CH
• Michael Hanko · Dresden, DE

Key dates

• Filing date: Oct 21, 2020
• Grant date: Mar 26, 2024
• Expiry date: Nov 30, 2040

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N27/4161
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Disclosed is a digital pH sensor for measuring the pH, comprising an electronics unit, sensor housing having a first half-cell and a second half-cell adapted to form a potential difference between the first electrode and the second electrode if the digital pH sensor is in contact with a measurement medium, wherein the electronics unit is adapted for converting the potential difference into a digital voltage value or a digital pH value, wherein the first electrolyte, the first electrode, the second electrolyte, and/or the second electrode are selected such that, at a pH value of 7 and a temperature of 25° C. in the measurement medium, the potential difference of the two electrodes is not equal to 0 mV, and wherein the electronics unit converts the potential difference into the digital measured pH value of 7 or a digital measured voltage value of 0 mV.