NTC thermistors are commonly used for measurement of temperature due to their convenient shape, size, ruggedness and higher order of sensitivity. Thermistors relatively large resistance change per degree change in temperature makes it an obvious choice as a temperature transducer. A typical industrial thermistor with 2000 ohms resistance of 250 C and a temperature coefficient of 3.9% per degree centigrade will exhibit a resistance change of 78 ohms per degree centigrade. In this paper, the author develops an analog technique and tested over a wide range of temperatures from 3000 K to 3720 K.The author develops a scheme using single thermistor for response linearization. The Taylor’s series has been used to linearize the gain characteristic of the modified bridge circuit. The simulation and experimental results obtained thus is independent of the specifications of the thermistor.
