Title:
ELECTROCHEMICAL GAS SENSOR SYSTEM WITH IMPROVED ACCURACY AND SPEED
Document Type and Number:
WIPO Patent Application WO/2018/152289
Kind Code:
A3
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.
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Inventors:
CHENG JIM (US)
LEE ERIC (US)
BHAT JEROME (US)
LEE ERIC (US)
BHAT JEROME (US)
Application Number:
PCT/US2018/018306
Publication Date:
September 20, 2018
Filing Date:
February 15, 2018
Export Citation:
Assignee:
INSYTE SYSTEMS (US)
International Classes:
G01N27/404; G01N27/30; G01N27/48
Domestic Patent References:
| WO2007149471A2 | 2007-12-27 |
Foreign References:
| US6376124B1 | 2002-04-23 | |||
| US20050034987A1 | 2005-02-17 |
Attorney, Agent or Firm:
OGONOWSKY, Brian, D. (US)
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