Configurable electrochemical gas sensor

Abstract

An electrochemical gas detector includes an electrochemical cell, a switching circuit, and a drive circuit. The switching circuit is electrically coupled to the electrochemical cell and to the switching circuit. The drive circuit includes a working-electrode terminal, a counter-electrode terminal, and a reference-electrode terminal. The electrochemical cell includes a first electrode, a second electrode, and a third electrode. The switching circuit has a first state in which the first electrode is electrically coupled to the working-electrode terminal, the second electrode is electrically coupled to the counter-electrode terminal, and the third electrode is electrically coupled to the reference-electrode terminal. The switching circuit has a second state in which the first electrode is electrically coupled to the counter-electrode terminal, the second electrode is electrically coupled to the working-electrode terminal, and the third electrode is electrically coupled to the reference-electrode terminal. A second drive circuit can be electrically coupled to the switching circuit.

Description

[0001] Cross References to Related Applications : This application claims priority to U.S. Provisional Application No. 62 / 988,732, filed March 12, 2020, entitled "Reconfigurable Environmental Sensor," which application is hereby incorporated by reference. technical field [0002] This application relates generally to electrochemical gas sensors. Background technique [0003] Given the changes in the Earth's atmosphere caused by industrialization and natural sources, and the dramatic increase in sources of household and urban pollution, the need for accurate and continuous air quality monitoring is essential both to identify sources and to warn consumers of impending dangers. have become necessary. Equivalent to real-time monitoring and exposure assessment, the reality is the ability to deliver low-cost, small-form-factor, low-power devices that can be integrated into the broadest range of platforms and applications. [0004] There are various methods of sensing different l...

AI Technical Summary

Problems solved by technology

A disadvantage of conventional electrochemical sensors is that they have a fixed configuration in which each electrode has a dedicated function

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