PT1000 PROBES

What is a Pt1000?

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.

Characteristics of Pt1000 Sensors

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 to use a Pt100 or a thermocouple.

A Pt100 and Pt1000 sensing element mounted to a mineral insulated probe.

PT1000

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PT1000

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Integrated Transmitters

Our Pt1000 probes are also available with common industrial output signals: 4-20 mA and 0-10 V. These output provide you with more flexibility and are less prone to errors. Check out our temperature sensors with integrated transmitter. 

Recommendations for Pt1000

Due to the signal strength of the Pt1000, you can use a Pt1000 in 2-wire configuration with up to 5 meters cable length. For cable lengths of more than five meters, we recommend using a Pt1000 in 3- or 4- wire configuration in order to avoid measurement errors caused by the cable. 

In case of very high accuracy requirements, the power supply of a Pt1000 must be below 0.1 mA in order to minimize the self-heating of the sensing element. 

Regarding the response time of a probe, here’s a rule of thumb: if you double the diameter, you quadruple the response time. So choose the diameter wisely! 

As with all temperature sensors, the immersion length should be at least 5x the diameter of the probe in order to avoid thermal bridge errors. 

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