Use of a temperature-sensitive ferrite for temperature/humidity measurements
Kazuhiko Seki, Junichi Shida, Koichi Murakami · IEEE Transactions on Instrumentation and Measurement · 1988
A temperature-sensitive ferrite (TSF) is a multi-ability sensor, which adds the functions of a thermistor and a switching diode to the temperature-sensitive magnetic core. The TSF has a humidity dependence which causes the resistance to decrease with a rise in humidity. Magnetic reluctance is temperature-dependent and is independent of humidity. Techniques for converting temperature and humidity into frequencies are discussed.>