A Simple Thermistor Design for Industrial Temperature Measurement

Abstract

This paper presents a simple temperature measurement design using thermistor for industrial purposes. This paper establishes the characteristics of the resistance via temperature and it’s constant since it has been difficult to determine if a thermistor has a positive or negative temperature coefficient. The practical approach was adopted to determine its characteristics where it was revealed that all thermistors are nonlinear in nature. In this design, the empirical and the practical design were compared; its implementation considers the temperature within the ranges of 350C to 600C which is 308K to 333K respectively. Other considerations were given to the output voltages between 0.155V – 1.055V, ambient temperature of 00C – 250C, Percentage non-linearity as low as 0.16, and a sensitivity of 0.0367V/ºC but the resolution of this device is 1ºC.The result obtained were analysed to ascertain the functionality of the experimented design via its performance and suggestions on further improvement were made.