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RTD Sensors

A Resistance Temperature Detector (RTD) is a temperature sensor which contains a resistor, the resistance changes with temperature; this can be correlated to give a temperature reading on a display or measurement device.

Detectors are most commonly made using platinum because it follows a linear repeatable resistance-temperature relationship over a large range.

They are also know as Platinum Resistance Thermometers (PRT). PRT sensors are thin film for low temperature  or wire wound for higher temperature.

The RTD Pt100 sensor is the most common and has a resistance of 100 ohms at 0°C whilst the Pt1000 sensor has a resistance of 1000 ohms as 0°C.

RTD Technical Reference Pages

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