Conductometry and oscillometry

Püngor, E.

doi:10.1016/0022-0728(62)85022-0

Cited by 4 publications

(1 citation statement)

References 83 publications

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“…At the fixed AC voltage and frequency, the registered current depends on sample conductivity. While these ideas were evolved from oscillometry based on the capacitive principle, another measuring mode suggested in the 1950s was based on inductivity . The practical realization of this mode was performed by placing the cell containing the sample into the inductance coil.…”

Section: Introductionmentioning

confidence: 99%

A Simple Contactless High-Frequency Electromagnetic Sensor: Proof of Concept

et al. 2022

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We report on the development of a very simple and inexpensive sensor device based on an inductance coil connected to a high-frequency electric field generator. The working principle of this sensor is as follows: liquid sample in a plastic tube is placed inside the inductance coil as its core and this core changes the properties of high-frequency electric current passing through the coil; these changes depend on sample conductivity, dielectric constant, magnetic properties, and capacitance. The electric signal registered after the coil represents a kind of a spectrum that can be effectively treated with chemometric tools. Our studies have shown that such a sensor can be used to distinguish between substances with different physical and chemical properties; different concentrations of ions in aqueous solutions with a linear response in a broad concentration range from 10 −3 M to 10 −1 M; can quantify the fat content in milk and cream samples with about 2% accuracy; and can distinguish between bacterial cultures and cell line cultures. The measurements are very fast and contactless, and the results show good promise for developing a number of applications of this sensor system.

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Section: Introductionmentioning

confidence: 99%