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Author Natarajan, S.P. ♦ Huffman, J. ♦ Weller, T.M. ♦ Fries, D.P.
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©2004
Language English
Subject Domain (in DDC) Technology ♦ Engineering & allied operations ♦ Applied physics
Subject Keyword Conductivity ♦ Radio frequency ♦ Coils ♦ Phase detection ♦ Prototypes ♦ Testing ♦ Insulation ♦ Printed circuits ♦ Coupling circuits ♦ Voltage
Abstract A contact-less toroidal coil based fluid conductivity sensor has been designed, prototyped and tested on sea water samples of different salinities. The novelty of the design lies in the coil construction and RF phase detection used for the conductivity sensing. The sensor is made of two insulated toroidal coils having an area of 15/spl times/15 mm/sup 2/, 1.5 mm thick and embedded in a printed circuit board (PCB). The conductivity detection technique involves detecting a phase change that occurs between an alternating signal that couples between two such closely held coils inside the fluid. The sensing circuitry, which provides the input and converts the phase change into an output voltage was also assembled and integrated with the sensor.
Description Author affiliation: Dept. of Electr. Eng., Univ. of South Florida, Tampa, FL, USA (Natarajan, S.P.; Huffman, J.; Weller, T.M.)
ISBN 0780386922
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research ♦ Reading
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2004-10-24
Publisher Place Austria
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Size (in Bytes) 894.59 kB
Page Count 4
Starting Page 304
Ending Page 307

Source: IEEE Xplore Digital Library