For a PT100 sensor, a 1 °C temperature change will cause a 0.384-ohm change in resistance, so even a small error in measurement of the resistance can cause a large error in the measurement of the temperature.
A large temperature range (from -200 to +850 °C) is covered by the exceptional accuracy of platinum resistance thermometers (PRTs). Standard sensors come in a wide range of accuracy criteria and package choices to accommodate the majority of applications. It's not essential to utilize special wires to connect to the sensor, unlike thermocouples. To best suit the application, care should be used when selecting the probe and cable types. The temperature range and exposure to liquids (corrosive or conductive) or metals are the key problems. Without a certain, temperatures higher than approximately 170 °C shouldn't be used for regular solder connections on cables.
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