Prototype of low temperature sensor based on coils-resistance temperature detector enhanced with three-wire configurations bridge
Moh. Toifur, Bagus Haryadi, Widya Rahmadani · Contemporary Engineering Sciences · 2015
Prototype of low temperature sensor based on Coils-Resistance Temperature Detector (C-RTD) has been made. The objective of this research was to find the most optimum of wire diameter and number of windings as C-RTD sensor in responding the changes of low temperature medium. Sample consist of copper wire where diameter was varied from 0.1 to 0.3 mm, and number of windings was varied from 100 to 500. Liquid nitrogen was used as low temperature medium that by direct evaporation to free air, temperature is possible to be set from -140C up to 0C. Three-Wire Configuration Bridge (3-WCB) was used as transducer to facilitates the output voltage at both ends of the sensor. The set temperature (T) and voltage (V) data were fitted according to second order polynomial. The goodness