Temperature Measuring Devices Ppt

Mechanical thermometers can be constructed which use liquids solids or even gases as the temperature sensitive material.

Temperature measuring devices ppt.

The main advantage of this device is it does not use any power source for their operation. This device can measure temperature from 80 o c to 600 o c. Temperature measurement ppt 1. 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. Several scales and units exist for measuring temperature the most common being celsius fahrenheit and especially in science kelvin. 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. Temperature measurement 1 0 introduction temperature measurement in today s industrial environment encompasses a wide variety of needs and applications.

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. The relative change in resistance temperature coefficient. 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. Thermoresistive rtds and thermistors 4.

Accurate temperature measurement devices are critical for ensuring the safety of meat products. But these are not so accurate like electrical devices such as thermocouple. Temperature measurement devices ppt. Introduction temperature heat scale glass thermometer bi metallic thermometer rtd thermocouple thermistor ic sensor how to choose 3.

Selection and maintenance of temperature measurement devices kevin keener ph d p e. Temperature measurement presented by. Radiative infrared and optical pyrometers. Mechanical devices liquid in glass thermometers bimetallic strips bulb capillary pressure type etc 2.

Resistance temperature relationship of metals. Avishek kumar 13 ei 08 2. Calibration of temperature measurement devices is one of the most important verification activities a meat or poultry processor can perform.