A resonance-induced sensitivity enhancement method for conductivity sensors

Chi Yuan Shih; Wei Li; Siyang Zheng; Yu Chong Tai

doi:10.1109/ICSENS.2007.355772

A resonance-induced sensitivity enhancement method for conductivity sensors

Chi Yuan Shih, Wei Li, Siyang Zheng, Yu Chong Tai

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

18 Scopus citations

Abstract

We demonstrated in this paper a novel technique named Resonance-Induced Sensitivity Enhancement (RISE) method to be used for significantly improving the sensitivity of a variety of conductivity sensing devices. The technique works by introducing a parallel inductor to the conductivity sensor cell and operating the sensor system at the resonant frequency of its equivalent circuit model. At the resonant frequency, parasitic capacitances that are either in series or in parallel with the target conductance can be virtually removed from the equivalent circuit and therefore a much higher sensitivity to the target conductance is obtained. In a specific example, the sensitivity of a microchip capacitively-coupled contactless conductivity detector (C⁴D) can be improved by more than 10,000 times.

Original language	English (US)
Title of host publication	2006 5th IEEE Conference on Sensors
Pages	271-274
Number of pages	4
DOIs	https://doi.org/10.1109/ICSENS.2007.355772
State	Published - Dec 1 2006
Event	2006 5th IEEE Conference on Sensors - Daegu, Korea, Republic of Duration: Oct 22 2006 → Oct 25 2006

Publication series

Name	Proceedings of IEEE Sensors

Other

Other	2006 5th IEEE Conference on Sensors
Country	Korea, Republic of
City	Daegu
Period	10/22/06 → 10/25/06

All Science Journal Classification (ASJC) codes

Electrical and Electronic Engineering

Access to Document

10.1109/ICSENS.2007.355772

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abstract = "We demonstrated in this paper a novel technique named Resonance-Induced Sensitivity Enhancement (RISE) method to be used for significantly improving the sensitivity of a variety of conductivity sensing devices. The technique works by introducing a parallel inductor to the conductivity sensor cell and operating the sensor system at the resonant frequency of its equivalent circuit model. At the resonant frequency, parasitic capacitances that are either in series or in parallel with the target conductance can be virtually removed from the equivalent circuit and therefore a much higher sensitivity to the target conductance is obtained. In a specific example, the sensitivity of a microchip capacitively-coupled contactless conductivity detector (C4D) can be improved by more than 10,000 times.",

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