Selection of the Most Efficient Temperature Measurement Method Based on Desired Response Time and Experimental results

Abstract

This paper aims to present how temperature can be measured in the fastest and most accurate way using different types of sensors. It closely describes the use of simplistic temperature measurement via thermometer liquids and bimetallic thermometers, as well as the advanced measurements using thermocouples, NTC resistors, etc. Semiconductor materials which behave as ideal isolators at very low temperatures are depicted as the most slow rate response sensors, because of the time it takes for them to heat up. Whilst in most cases thermocouples type K have the quickest response time, and the most effective, due to the fact that their junction, when heated, generates thermoelectric voltage; this allows the measuring of the temperature. Also, the temperature measurement with thermistors resistance is very much explained using 2, 3, 4 -conductor connection. Furthermore, explained in detail is the main purpose which is to enable the documenting of characteristic curves via a 3 channel line recorder using measured values from the electrical temperature sensors and providing a response time through readings. In the finale stage of the paper experimental readings, calculations and measurement are shown and compered with one another according to the use of non protection tubes, tubes of high-grade steel and immersion tubes made of brass.