The Pt1000 is closely related to the Pt100, the most popular resistance thermometer. Pt is for Platinum, which the resistor is made of. 1000 is for its resistance of 1000 Ohms at 0 °C. As with all resistance temperature detectors (RTD), the sensing element changes its electrical resistance with changing temperature.

The Pt1000 has the same linearity as the Pt100, but it has 10x the signal strength. It is accurate in a wide temperature range. These characteristics make a Pt1000 a good choice when the range of an NTC is too small and the signal of a Pt100 is too weak. The temperature range of Pt1000 temperature sensors extends from -50 to +500 °C. Outside of this range, we recommend the use of a thermocouple. The minimum diameter of Pt1000 probes is typically 3 mm. If you require a smaller diameter, we recommend using a Pt100 or a thermocouple.