ABSTRACT
Materials .................................................................... 636 14.4 Practical Thermocouples ........................................... 637 14.5 Cold Junction Compensation .................................... 641 14.6 Compensating Wires.................................................. 643 14.7 Construction of Thermocouples ................................ 643 14.8 Selection of Thermocouples....................................... 645 14.9 Radiation Pyrometry ................................................. 647
14.9.1 Principle of Radiation................................... 647 14.9.2 Practical Problems ........................................ 649
14.10 Disappearing Filament Pyrometer ........................... 655 14.11 Radiation Pyrometers................................................ 657
14.11.1 Advantages of Radiation Pyrometers........ 661 14.11.2 Limitations.................................................. 661
14.12 Miscellaneous Temperature-Related Devices .......... 662 14.12.1 Temperature-Indicating Colors.................. 662 14.12.2 Bimetallic Devices ...................................... 662 14.12.3 Bimetallic Energy Regulators ................... 663 14.12.4 Throwaway Tips.......................................... 666
14.13 Temperature Indicators ............................................. 666 14.14 Temperature Controllers ........................................... 668
14.1 INTRODUCTION
There are different objectives for heating an object — such as melting, heat treatment, joining, and processing. The only way to know whether it is heated properly is to measure its temperature. Thus, the temperature measurement and its control is of paramount importance in the design and operation of all types of heating apparatus.
