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Resistance Temperature Detectors (RTD's) operate under the principle that the electrical resistance of certain metals increases or decreases in a repeatable and predictable manner with a temperature change. RTD's may have a lower temperature range than some thermocouples and a slower response time, however, they are more stable and repeatable over long periods of time. RTD's higher signal output make them easier to interface with computers and data loggers and reduces the effects of radio frequency interference. Industrial RTD's are used in the process and power industry, pipe lines and vessels. The more commonly used configurations are listed on the following pages They represent only a small portion of Thermo Electric's capability to manufacture quality products conforming to your specifications.
The standard RTD employs either thin film or wire wound bulb depending on the temperature range desired. The most common is the platinum, 100 OHM with a temperature coefficient of resistance of 0.00385 ohms/ohm/°C. Standard tolerance is a grade B to ASTM E1137. For tighter accuracy the grade A is available. |
