In-Line Capacitive Moisture Sensor for Polymer Industries

Barrettino, Diego and Badaracco, Giovanni and Sala, Marco and Piffaretti, Filippo and Sammartini, Marco (2013) In-Line Capacitive Moisture Sensor for Polymer Industries. 2013 IEEE International Instrumentation and Measurement Technology Conference (I2MTC).

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This paper presents the design and development of a novel in-line capacitive moisture sensor for polymer industries. This capacitive moisture sensor can reach a precision of 5 ppm moisture (equivalent to a capacitance change of 10 fF) in harsh industrial environments and over a wide temperature range from 0°C to +200°C. Simulation results used to optimize the sensor sensitivity and experimental results obtained from moisture measurements for the polymer polybutylene terephthalate (PBT) during a drying cycle of 6 hours are reported.

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