Sensor for the measurement of liquid permittivity using one measurement cell

Author

Matko, V.

Author_Institution

Fac. of Electr. Eng. & Comput. Sci., Maribor Univ., Slovenia

fYear

2000

fDate

14-19 May 2000

Firstpage

461

Lastpage

462

Abstract

A permittivity sensor using sensitive capacitive-dependent crystals is described. Presented is the probe sensitivity (dependence of df on permittivity). In addition, the new idea of excitation of the entire sensor with stochastic test signals is described, and the permittivity surface-measuring method is given. The latter includes the influence of test signals on the weighting function uncertainty. The uncertainty of the surface permittivity measurement is less than 0.01% (T=10-30/spl deg/C).

Keywords

capacitive sensors; liquids; measurement uncertainty; permittivity measurement; sensitivity; 10 to 30 C; liquid permittivity measurement; permittivity sensor; permittivity surface-measuring method; probe sensitivity; sensitive capacitive-dependent crystal; sensor excitation; single measurement cell; stochastic test signals; weighting function uncertainty; Capacitance; Capacitive sensors; Equations; Frequency; Measurement uncertainty; Permittivity measurement; Probes; Pulse width modulation; Sensor phenomena and characterization; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Precision Electromagnetic Measurements Digest, 2000 Conference on

Conference_Location

Sydney, NSW, Australia

Print_ISBN

0-7803-5744-2

Type

conf

DOI

10.1109/CPEM.2000.851075

Filename

851075