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Principles and Methods of Temperature Measurement

COURSE NO: E02-012
Principles and Methods of Temperature Measurement
Course Highlights

This online engineerng PDH course describes the four basic types of temperature measuring devices, each working on a different principle:

  1. Mechanical (liquid-in-glass thermometers, bimetallic strips, bulb and capillary, pressure type, etc.)
  2. Thermocouples
  3. Thermo-resistive (RTD's and thermistors)
  4. (infrared and optical pyrometers)


Temperature is a principle parameter that needs to be monitored and controlled in most engineering applications such as heating, cooling, drying and storage. Temperature can be measured via a diverse array of sensors. All of them infer temperature by sensing some change in a physical characteristic be it a thermal expansion, thermoelectricity, electrical resistance or thermal radiation.


This 2 PDH online  course is applicable to electrical, instrumentation and control engineers, energy auditors, O&M professionals, contractors, estimators, facility managers and general audience interested in learning more about the principles and methods of temperature measurement.

Learning Objectives

This PE continuing education course is intended to provide you with the following specific knowledge and skills:

  • Learning the  various types of temperature sensors
  • Understanding the principle of operation of thermocouples (Peltier effect, Thompson effect and Seebeck effect)
  • Learning about the basic construction of a thermocouple including materials used
  • Knowing the three laws of thermocouples (law of intermediate metals, law of intermediate temperatures and law of additive voltages)
  • Understanding the difference between grounded, ungrounded and exposed junctions
  • Knowing the basic principle and construction of RTDs and Thermistors
  • Understanding the difference between the two main types of thermistors i.e. positive; temperature coefficient (PTC) and negative temperature coefficient (NTC)
  • Explaining how RTD resistance varies for increase and decrease of temperatures using bridge circuits
  • Knowing the basic principles of radiative temperature measurement including infrared and optical pyrometers
Course Document

In this professional engineering CEU course, you need to review the document titled "Principles and Methods of Temperature Measurement".

To view, print and study the course document, please click on the following link(s):
Principals and Methods of Temperature Measurement (1 MB)
Course Quiz
Once you complete your course review, you need to take a multiple-choice quiz consisting of fifteen (15) questions to earn 2 PDH credits. The quiz will be based on the entire document.


The minimum passing score is 70%. There is no time limit on the quiz, and you can take it multiple times until you pass at no additional cost.
Certificate of Completion

Upon successful completion of the quiz, print your Certificate of Completion instantly. (Note: if you are paying by check or money order, you will be able to print it after we receive your payment.) For your convenience, we will also email it to you. Please note that you can log in to your account at any time to access and print your Certificate of Completion.

To buy the course and take the quiz, please click on: