Principles and Methods of Temperature Measurement
A. Bhatia, B.E.
a principle parameter that needs to be monitored and controlled in most engineering
applications such as heating, cooling, drying and storage. Temperature sensors
vary from simple liquid-in-glass thermometers to sophisticated on-line monitoring
and automatic temperature control purposes. This course focuses on the most
commonly used temperature sensors.
This 2-hour course provides an overview of basic principles of temperature sensors in user friendly language. The theoretical equations are kept minimum and the basic aspects are discussed wherever deemed fit.
This course includes a multiple-choice quiz at the end, which is designed to enhance the understanding of the course materials.
At the conclusion of this course, the student will be aware of:
This course is aimed at students, electrical & control engineers, energy auditors, O & M professionals, contractors, estimators, facility managers and general audience.
have been developed based on different temperature-dependent physical phenomena
including thermal expansion, thermoelectricity, electrical resistance, and thermal
radiation. All of them infer temperature by sensing some change in a physical
characteristic. There are four basic types of temperature measuring devices,
each of which uses a different principle:
1) Mechanical (liquid-in-glass thermometers, bimetallic strips, bulb & capillary, pressure type etc.)
3) Thermo-resistive (RTDs and thermistors)
4) Radiative (infrared and optical pyrometers)
Each of these is defined and the discussed in this learning module.
The course content is in a PDF file Principles and Methods of Temperature Measurement. You need to open or download this document to study this course.
a vital part of most industrial operations, is typically accomplished by a temperature
sensor--a thermocouple or a resistance temperature detector (RTD)--in contact
with a solid surface or immersed in a fluid. Although these sensors have overlapping
temperature ranges, each has certain application-dependent advantages.
Several factors must be considered when selecting the type of sensor to be used in a specific application: temperature range, accuracy, response time, stability, linearity, and sensitivity. An RTD is the sensor of choice when sensitivity and application flexibility are the most important criteria. When it comes to component cost, an RTD is more expensive than a thermocouple. Choosing the perfect sensor for a particular application therefore requires an understanding of the basics of temperature sensors.
Once you finish studying the above course content, you need to take a quiz to obtain the PDH credits.