A study on the wheatstone-based electrical measurement of temperature

Abstract

The In this work we present some specific discussions on a conventional electrical circuit design on measuring temperature by using Platinum-type RTDs (PRTDs) and PTC (Positive Temperature Coefficient)-type thermistors, a conventional unmodified Wheatstone bridge, and operational amplifier. The Wheatstone bridge is widely used as a fundamental electrical circuit to read resistive sensors but some parameters in the design involves careful physical considerations such as sensor accuracy, sensor non-linearity and linearity of the Wheatstone bridge whose discussions are being presented here for the optimum design parameters regarding the determination of the resistors in the bridge.The In this work we present some specific discussions on a conventional electrical circuit design on measuring temperature by using Platinum-type RTDs (PRTDs) and PTC (Positive Temperature Coefficient)-type thermistors, a conventional unmodified Wheatstone bridge, and operational amplifier. The Wheatstone bridge is widely used as a fundamental electrical circuit to read resistive sensors but some parameters in the design involves careful physical considerations such as sensor accuracy, sensor non-linearity and linearity of the Wheatstone bridge whose discussions are being presented here for the optimum design parameters regarding the determination of the resistors in the bridge.