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Sensitivity Tunable Inductive Fluid Conductivity Sensor Based on RF Phase Detection

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3 Author(s)
Saravana P. Natarajan ; Univ. of South Florida, Tampa ; Thomas M. Weller ; David P. Fries

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.

Published in:

IEEE Sensors Journal  (Volume:7 ,  Issue: 9 )