What is RTD

In this presentation i have deeply and in easy way describe that What is RTD and working principal of RTD..

1. Name Zahid Abbas Roll No 312/F17 Group No #02 BSc Mech Engr & Tech

2. RTD’s

3. Introduction Resistance Temperature Detector Configurations Working of RTD Applications Advantages Disadvantage Contents

4. Introduction Sir William siemens prefer the use of platinum as the element in a RTD. The classical resistance temperature detector (RTD) Construction using platinum was proposed by C.H. Meyars in 1932

5. Resistance Temperature Detector(RTD’ S ) Resistance Thermometers are the sensors used to measure temperature by comparing the resistance of the RTD element with Temperature RTD converts the temperature into the electrical resistance ,which can be measured using the wheatstone Bridges A  Wheatstone bridge  is an  electrical circuit  used to measure an unknown  electrical resistance

6. Pt 100 PT-100 is a platinum RTD which is most widely use in industries The resistance of the PT-100 RTD is 100 Ω at 0 ° C . Resistance Temperature of platinum is 0.00392 ° C

7. Material of Rtd’S

8. Name Ishtiaq Hussain Roll No 304/F17 Group No #02 BSc Mech Engr & Tech

9. Rtd’s Configurations RTD is available in basically three configurations Two wire compensation Three wire compensation Four wire compensation

10. Two wire compensation:- The 2 wire RTD configuration is the simplest among RTD circuit designs. In this serial configuration, a single lead wire connects each end of the RTD element to the monitoring device.

11. Three wire compensation:- The 3 wire RTD configuration is the most commonly used RTD circuit design and can be seen in industrial process and monitoring applications.

12. Four wire compensation:- This configuration is the most complex and thus the most time-consuming and expensive to install, but it produces the most accurate results.

13. Working of RTd

14. Name Taimoor Hussain Roll No 305/F17 Group No #02 BSc Mech Engr & Tech

15. Applications of rtd’s Air Conditioning and Refrigeration Food processing Grills Plastics processing Petrochemical process Air temperature measurement Gas temperature measurement Liquid temperature measurement Exhaust gas temperature measurement

16. Advantages of RTD Sensors RTD sensors have many advantages.  Highly accurate High repeatability Offer precise measurement even in extreme environments Long term stability Platinum RTD are suitable for higher temperature ranges No special wire required for installation Easy Installation

17. Disadvantage of Rtd sensor The RTD require more complex measurement circuit. More limited temperature range (-200 deg C to 500 deg C) High initial price Slower response time than a thermocouple Possibility of self heating. It is affected by shock and vibration.