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Temperature Measurement

Different Types of Thermometers

S Bharadwaj Reddy
Thermometers can be classified according to the nature of substance which expands. Expansion of solids             (a). Bimetallic  thermometers Expansion of liquids             (a) Liquid in glass thermometers             (b)

Questions on Thermocouple and Pyrometer

S Bharadwaj Reddy
Study the Temperature Sensors Questions and Answers for your interview preparation. This article focus on Thermocouple and Pyrometer Questions. Thermocouple and Pyrometer 1. Define Seebeck effect? When a pair of

Disadvantages of Resistance Temperature Detectors

S Bharadwaj Reddy
Resistance Temperature Detectors (RTDs), are sensors used to measure temperature. Many RTD elements consist of a length of fine wire wrapped around a ceramic or glass core but other constructions

Important Factors for Thermocouple Selection

S Bharadwaj Reddy
It would be difficult to chart a career course in the industrial process control field without being exposed to thermocouples. They are the ubiquitous basic temperature measuring tools with which

What is Thermowell and How-to choose Thermowell Probe Length ?

S Bharadwaj Reddy
The American Society for Testing and Materials (ASTM) has defined the term Thermowell as ” a closed end re-entrant tube designed for insertion of temperature sensing element, and provided with

Resistance Temperature Detectors (RTD) Construction

S Bharadwaj Reddy
The RTD incorporates pure metals or certain alloys that increase in resistance as temperature increases and, conversely, decrease in resistance as temperature decreases. RTDs act somewhat like an electrical transducer,

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