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 proceedingConference contribution

21 Scopus citations


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 languageEnglish (US)
Title of host publication2006 5th IEEE Conference on Sensors
Number of pages4
StatePublished - 2006
Event2006 5th IEEE Conference on Sensors - Daegu, Korea, Republic of
Duration: Oct 22 2006Oct 25 2006

Publication series

NameProceedings of IEEE Sensors


Other2006 5th IEEE Conference on Sensors
Country/TerritoryKorea, Republic of

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering


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