Category : Temperature Measurement

Temperature Measurement

Thermowell Design Guidelines

S Bharadwaj Reddy
When fluid flows past a thermowell inserted into a pipe or duct, vorticies form at both sides of the well. These vorticies detach, first from one side, and then from the other. This...

Thermistor Working Principle

S Bharadwaj Reddy
Thermistors Thermistors are temperature sensitive semiconductors that exhibit a large change in resistance over a relatively small range of temperature. There are two main types of thermistors, positive temperature coefficient...

Resistance Temperature Detectors Working Principle

S Bharadwaj Reddy
Resistance Temperature Detectors (RTD) Working Principle Thermo-resistive Temperature Measuring Devices A change in temperature causes the electrical resistance of a material to change. The resistance change is measured to infer...

Thermocouple Working Principle

S Bharadwaj Reddy
THERMOCOUPLES A thermocouple is made up of two dissimilar metals, joined together at one end, that produce a voltage (expressed in millivolts) with a change in temperature. The junction of...

Mechanical Temperature Measuring Sensors

S Bharadwaj Reddy
Temperature can be measured via a diverse array of sensors. All of them infer temperature by sensing some change in a physical characteristic. There are four basic types of temperature...

Basics of Thermocouples and RTD

S Bharadwaj Reddy
Thermocouples What are Thermocouples? Thermocouples are temperature sensors. They operate under the principle that the junction of two dissimilar metals (forming a closed circuit) produces a measurable voltage (electromotive force)...

Temperature Switch Working Principle

S Bharadwaj Reddy
Temperature is a measure of the average heat or thermal energy of the particles in a substance. Since it is an average measurement, it does not depend on the number...

How to calculate Thermocouple Temperature by measuring the output millivoltage

S Bharadwaj Reddy
HOW TO DETERMINE TEMPERATURE BY MEASURING THE OUTPUT MILLIVOLTAGE OF A THERMOCOUPLE THERMOCOUPLE REFERENCE TABLES The N.I.S.T. (National Institute of Standards and Technology) is the U.S. standards setting agency. They...

Calculate Temperature Transmitter Output

S Bharadwaj Reddy
An electronic  temperature transmitter is ranged  50 to 140 degrees  Fahrenheit and  has  a 4-20 mA output  signal.   Calculate  the  current output  by this  transmitter if the  measured  temperature is...

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