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.