Title :
Sensitivity Tunable Inductive Fluid Conductivity Sensor Based on RF Phase Detection
Author :
Natarajan, Saravana P. ; Weller, Thomas M. ; Fries, David P.
Author_Institution :
Univ. of South Florida, Tampa
Abstract :
New results are presented for a sensitivity-tunable, inductive fluid conductivity sensor based on RF phase detection. An electronically controlled RF phase shifter allows the sensor to function in a wide range of conductivities from 2-70 mS/cm and helps tune the sensitivity of the response in a selected conductivity range. The noncontact nature of the sensor makes it suitable for corrosive fluids. Furthermore, the small size of the sensing element (1 inch. Sq X 6 mm thick) makes it suitable for compact in-line and hand held monitoring systems.
Keywords :
coils; electric sensing devices; electrical conductivity measurement; phase detectors; phase shifters; compact in-line systems; contactless toroidal sensor; corrosive fluids; coupled RF signal phase detection; electronically controlled RF phase shifter; hand held monitoring systems; inductive fluid conductivity sensor; sensitivity tunable sensor; toroidal coils; Biosensors; Chemical sensors; Coils; Conductivity; Electrodes; Monitoring; Phase detection; Phase shifters; Radio frequency; Testing; Corrosive fluid sensor; phase sensor; salinity sensor;
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2007.901570
