How to Use RTDs for Temperature Measurement – 8500917
The Basics of Temperature Measurement Using RTDs
Temperature reigns as the most often measured process parameter in industry. Most industrial applications require that a temperature be measured remotely, and that this signal be transmitted some distance. An industrial transmitter is commonly used to amplify, isolate, and convert the low-level sensor signal to a high level signal suitable for monitoring or retransmission. With respect to these transmitters, your choice of sensor type is generally limited to T/C, or RTD. An RTD or Resistance Temperature Detector is a passive circuit element whose resistance increases with increasing temperature in a predictable manner. This Basics of Temperature Measurement Using RTDs paper provides information for choosing an industrial temperature sensor from Thermocouple (T/C) and Resistance Temperature Detector (RTD) sensor types.
The Basics of Resistance Temperature Detectors
- Points of Consideration When Using RTDs to Measure Temperature:
- Temperature Coefficient of Resistance (TCR)
- interchangeability and conformity
- stability and drift,
- corrosion and contamination
- shock and vibration
- insulation resistance
- lead-wire resistance
- packaging and thermal transfer
- response time
- thermoelectric effects
- The Basics of Temperature Measurement Using Thermocouples takes a close look at thermocouples.
- The Basics of Temperature Measurement a Comparison summarizes and compares the thermocouple and RTD sensor types, and provide information for selecting the best sensor for a given application.
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