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 relative change in resistance temperature coefficient. Thermoresistive rtds and thermistors 4. Several scales and units exist for measuring temperature the most common being celsius fahrenheit and especially in science kelvin. Temperature measurement 1 0 introduction temperature measurement in today s industrial environment encompasses a wide variety of needs and applications.

Temperature measurement presented by. To meet this wide array of needs the process controls industry has developed a large number of sensors and devices to handle this demand. Resistance temperature relationship of metals. But these are not so accurate like electrical devices such as thermocouple.

Calibration of temperature measurement devices is one of the most important verification activities a meat or poultry processor can perform. Radiative infrared and optical pyrometers. 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. 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 measurement devices ppt. So that we can easily use it to measure high temperatures. Introduction temperature heat scale glass thermometer bi metallic thermometer rtd thermocouple thermistor ic sensor how to choose 3. Temperature measurement ppt 1.

Accurate temperature measurement devices are critical for ensuring the safety of meat products. Avishek kumar 13 ei 08 2. Selection and maintenance of temperature measurement devices kevin keener ph d p e. This device can measure temperature from 80 o c to 600 o c.

There are four basic types of temperature measuring devices each of which uses a different principle. Various units of temperature measurement c degrees celsius or centigrade f degrees fahrenheit k kelvin r rankine relationship between different units c f 32 1 8 f 1 8 x c 32 k c 273 15 r f 459 67 conversion tables or software can be utilized to facilitate with converting between these units. 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.