Insyte Systems, Inc.

Maxim Integrated Products, Inc.

Qualcomm Technologies, Inc.

Eric Paul Lee

Jim Chih-Min Cheng

Jerome Chandra Bhat

Albert Song

Xiaoming Yan

Paul G Schroeder

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.

Electrochemical gas sensor with varying bias voltage and environmental compensation

An electrochemical gas sensor device with small physical footprint is disclosed. The electrodes within the element are arranged about the electrolyte such that the electrical impedance of the sensor is minimized. This results in a fast stabilization after detecting gasses and enables rapid changes in bias voltage to target different gasses. Gasketing elements, or alternative designs, are included to eliminate the diffusion of gasses between the electrodes within the cell.

Low impedance sensor for low density materials

Electrochemical gas sensor system with improved accuracy and speed

According to various embodiments of this disclosure, an electrochemical sensor/cell includes a substrate with a cavity formed on a first side of the substrate, an ionic conductor is disposed within the cavity, and a lid assembly positioned over the cavity. The lid assembly may include a plurality of electrodes attached to a glass or ceramic panel. The glass or ceramic panel may have one or more apertures allowing gas to flow therethrough. The plurality of electrodes include a working electrode configured to react a molecular species (e.g., gas or aerosolized substance) that diffuses through the one or more apertures, wherein said reaction produces ions mobile in the ionic conductor between two or more of the plurality of electrodes. The lid assembly may further include a three-phase interface positioned over at least a portion of the plurality of electrodes.

Mobile electrochemical air quality meter

Growing community of inventors

Mountain View, CA, United States of America

Eric Paul Lee