Page 1 1 39 Page 2 1 39 Earlier Topics • Introduction to Cryogenic Engineering • Properties of Cryogenic Fluids • Properties of Materials at Cryogenic Temperature • Gas Liquefaction and Refrigeration Systems • Gas Separation • Cryocoolers • Cryogenic Insulations • Vacuum Technology 2 Prof. M D Atrey, Department of Mechanical Engineering, IIT Bombay Page 3 1 39 Earlier Topics • Introduction to Cryogenic Engineering • Properties of Cryogenic Fluids • Properties of Materials at Cryogenic Temperature • Gas Liquefaction and Refrigeration Systems • Gas Separation • Cryocoolers • Cryogenic Insulations • Vacuum Technology 2 Prof. M D Atrey, Department of Mechanical Engineering, IIT Bombay Current Topic Topic : Instrumentation in Cryogenics • Need of Cryogenic Instrumentation • Measurement of Thermophysical Properties • Various Sensors • The current topic will be covered in 3 lectures. • Tutorials and assignments are also included. 3 Prof. M D Atrey, Department of Mechanical Engineering, IIT Bombay Page 4 1 39 Earlier Topics • Introduction to Cryogenic Engineering • Properties of Cryogenic Fluids • Properties of Materials at Cryogenic Temperature • Gas Liquefaction and Refrigeration Systems • Gas Separation • Cryocoolers • Cryogenic Insulations • Vacuum Technology 2 Prof. M D Atrey, Department of Mechanical Engineering, IIT Bombay Current Topic Topic : Instrumentation in Cryogenics • Need of Cryogenic Instrumentation • Measurement of Thermophysical Properties • Various Sensors • The current topic will be covered in 3 lectures. • Tutorials and assignments are also included. 3 Prof. M D Atrey, Department of Mechanical Engineering, IIT Bombay Topic : Instrumentation in Cryogenics • Need of Cryogenic Instrumentation • Measurement of Thermo physical Properties • Temperature 4 Prof. M D Atrey, Department of Mechanical Engineering, IIT Bombay Outline of the Lecture Page 5 1 39 Earlier Topics • Introduction to Cryogenic Engineering • Properties of Cryogenic Fluids • Properties of Materials at Cryogenic Temperature • Gas Liquefaction and Refrigeration Systems • Gas Separation • Cryocoolers • Cryogenic Insulations • Vacuum Technology 2 Prof. M D Atrey, Department of Mechanical Engineering, IIT Bombay Current Topic Topic : Instrumentation in Cryogenics • Need of Cryogenic Instrumentation • Measurement of Thermophysical Properties • Various Sensors • The current topic will be covered in 3 lectures. • Tutorials and assignments are also included. 3 Prof. M D Atrey, Department of Mechanical Engineering, IIT Bombay Topic : Instrumentation in Cryogenics • Need of Cryogenic Instrumentation • Measurement of Thermo physical Properties • Temperature 4 Prof. M D Atrey, Department of Mechanical Engineering, IIT Bombay Outline of the Lecture 5 Prof. M D Atrey, Department of Mechanical Engineering, IIT Bombay Introduction • In the earlier lecture, we have seen that the cryogenic vessels are insulated, closed containers. • Instrumentation is needed • To monitor the vacuum in insulation, as there is a continuous gas in leak. • To monitor the liquid level so as to avoid any over flow of the cryogen. • To monitor a sample’s temperature. Pr. LL TRead More