Practical Precautions for RTDs

When building RTDs some practical precautions must be taken. Being mindful of these precautions will help to ensure that your applications work correctly. Our team can help walk you through these problems so that we can build and deliver ideal devices. Below, you will find a small list of the most important precautions to focus attention on.pt100 rtd

Construction: An RTD is slightly more fragile than a thermocouple, and so extra precautions must be taken to protect the device. We can help custom design RTDs to fit specific applications and designs

Self-Heating: A RTD is not self-powered. To provide a voltage that is measurable, a current must pass through the device. The current can cause Joule heating inside the RTD (changing its temperature). This type of self-heating will present itself as a measurement error. As a result, particular attention must be paid to the magnitude of the current with an ohmmeter. Using minimum ohms measurement currents (that provide resolution you require) will help to reduce self-heating errors.

Thermal Shunting: Because of the physical bulk of an RTD, thermal shunting can be a problem. Thermal shunting is defined as the act of changing the measurement temperature by connecting a measurement transducer.

If you have any questions about RTD precautions, please give us a call. You can also call us to discuss building thermistors.

 

We offer RTD Temperature Sensor, PT100 to PT 1000: Platinum Thin Film RTD Element. Please contact Sensor Scientific for additional information.
 

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