Electrochemical gas sensor system with improved accuracy and speed
US10732141B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 2018 |
| Grant date | Aug 4, 2020 |
| Priority date | — |
| Expiry date | Jul 7, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/0013
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electrochemical cell for sensing gas has added mechanical support for the working electrode to prevent flexure of the working electrode due to pressure differentials. The added mechanical support includes: 1) affixing a larger area of the working electrode to the body of the cell; 2) a gas vent to a cavity of the body to equalize pressures; 3) a rigid electrolyte layer abutting a back surface of the working electrode; 4) infusing an adhesive deep into sides of the porous working electrode to enhance rigidity; 5) supporting opposing surfaces of the working electrode with the rigid package body; and 6) other techniques to make the working electrode more rigid. A bias circuit is also described that uses a controllable current source, an integrator of the varying current, and a feedback circuit for supplying a voltage to the counter electrode and a bias voltage to the reference electrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.