Temperature Measuring Devices Ppt

Mechanical temperature measuring devices principle of operation a change in temperature causes some kind of mechanical motion typically due to the fact that most materials expand with a rise in temperature.

Temperature measuring devices ppt.

Several scales and units exist for measuring temperature the most common being celsius fahrenheit and especially in science kelvin. Radiative infrared and optical pyrometers. There are four basic types of temperature measuring devices each of which uses a different principle. Definition temperature is the degree of sensible heat or cold expressed in terms of a specific scale.

To meet this wide array of needs the process controls industry has developed a large number of sensors and devices to handle this demand. Mechanical devices liquid in glass thermometers bimetallic strips bulb capillary pressure type etc 2. Temperature measurement presented by. Thermoresistive rtds and thermistors 4.

So that we can easily use it to measure high temperatures. Common rtd sensing elements constructed of platinum copper or nickel have a repeatable resistance versus temperature relationship r vs t and operating temperature range the r vs t relationship is defined as the amount of resistance change of the sensor per degree of temperature change. In today s presentation of temperature measuring instruments we will discuss some of the keypoints and types of thermometers used for temperature measurement moreover we are highlighting the working principles of the instruments and how they are different from each other. Temperature measurement devices ppt.

Avishek kumar 13 ei 08 2. Temperature measurement ppt 1. The relative change in resistance temperature coefficient. Introduction temperature heat scale glass thermometer bi metallic thermometer rtd thermocouple thermistor ic sensor how to choose 3.

This device can measure temperature from 80 o c to 600 o c. Calibration of temperature measurement devices is one of the most important verification activities a meat or poultry processor can perform. Accurate temperature measurement devices are critical for ensuring the safety of meat products. Temperature measurement 1 0 introduction temperature measurement in today s industrial environment encompasses a wide variety of needs and applications.

Selection and maintenance of temperature measurement devices kevin keener ph d p e. Resistance temperature relationship of metals. The main advantage of this device is it does not use any power source for their operation.