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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 Pt1000 sensor is a great temperature probe for many industrial applications. The Pt1000 is an RTD and can be used as a 2-wire Pt1000 even with rather long connection cables.


Discover Products

Mineral insulated temperature probe with overmoulded M12 connector. Available as Pt100 and Pt1000.

Mineral insulated Pt1000 RTD probe, M12 connector

Series: TRMSTD
Measuring range: -50 to 500 °C
Output: Pt1000 Class AA/A/B
Connection: 2, 3 or 4 wires
Mineral insulated temperature probe with overmoulded transition. Available as Pt100 and Pt1000.

Minderal insulated Pt1000 RTD, overmoulded transition

Measuring range: -50 to 500 °C
Output: Pt1000 Class AA/A/B
Connection: 2, 3 or 4 wires
Mineral insulated temperature probe with overmoulded M8 connector. Available as Pt100 and Pt1000.

Mineral insulated Pt1000 RTD probe, M8 connector

Series: TRSV8
Measuring range: -50 to 500 °C
Output: Pt1000 Class A/B
Connection: 3 wires

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Jacopo Baronio

Jacopo Baronio

Threaded Pt1000 screw-in probe with G1/8 “ process connection, perfectly suited as boiler probe

Pt1000 temperature probe with threaded process connection, overmoulded cable transition

Series: D045002C
Measuring range: -50 to 150 °C
Output: Pt1000
Thread: G1/8
A screw-in temperature probe with M12 connector and G1/8 thread

Pt1000 probe with 1/8 inch thread, overmoulded cable transition

Series: TRC
Messuring range: -50 bis 120 °C
Output: Pt1000
Connection: 4-Leiter
Black cable probe made from TPE. Overmoulded sensing element. Available as Pt100, Pt1000 and NTC.

Pt1000 RTD cable probe, overmoulded, IP68

Series: IKE2
Measuring range: -40 to 105 °C
Output: Pt1000 Class A/B
Connection: 2 wires

Integrated transmitters

By the way, our Pt1000 temperature sensors are also available with 4-20 mA and 0-10 V output signals. These outputs give you more flexibility and are less susceptible to interference. Take a look at our RTDs with integrated transmitter now!

Also, be sure to not miss our MODBUS temperature probes!

Four different versions of Italcoppie's evo temperature transmitters on a white background

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Jacopo Baronio

Jacopo Baronio

Frequently asked questions about the Pt1000 sensor

Pt1000 sensors are generally pretty accurate. The resistance values and accuracy classes are defined in DIN EN 60751 and IEC 751. Class AA is the one with the highest accuracy, class C the one with the lowest.

However, the accuracy of an individual sensor depends not only on the accuracy class of the measuring element, but also crucially on the cable length and the cable configuration (2-, 3- or 4-wire circuit) as well as the measuring current. The devil is in the details. Our experts are happy to help you choose the right temperature sensor!

The Pt1000 RTD has 10 times the resistance of a Pt100. It therefore has a significantly higher resolution. In addition, due to the higher base resistance, the unwanted resistance from lead wires adds less distortion than with a Pt100. This means that with cable lengths of up to 5 metres, you can stick to a simple 2-wire circuit.

On the other hand, the power loss of the Pt1000 is higher for the same measuring current. Therefore, you should apply a measuring current <0.1mA for high accuracy requirements in order to minimise the self-heating of the Pt1000 measuring element.

Due to its higher resistance, the Pt1000 is less sensitive to distortions from lead wire resistance than the Pt100. The resulting measurement error amounts to about 0.04 Kelvin per metre of cable length. With a Pt1000, we recommend that you use a 3- or 4-wire circuit with cables longer than 5m.

Alternatively, you can use a transmitter as close as possible to the sensor or directly use a temperature sensor with 0-10V/4-20mA output signal.

The output signal of a Pt1000 is relatively weak and therefore sensitive to interference. Amplification or conversion of the signal to a more robust one such as 0-10V or 4-20mA is therefore often recommended, particularly when using long connection cables. Our integrated transmitter also compensates for the measuring error and thus improves the accuracy.

You need a digital output signal? Take a look at our Modbus temperature sensor series!

Regarding the response time of a sensor, the following rule of thumb applies: 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 sensor to avoid thermal bridges.