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Resistance thermometers

Resistance thermometers with Pt100/Pt1000 resistance

Resistance thermometers are equipped with platinum sensor elements which change their electrical resistance as a function of temperature. In our range of products you will find resistance thermometers with connected cable as well as versions with connection head. A temperature transmitter can be installed directly in the connection head. Resistance thermometers are suitable for applications between -200 ... +600 °C (dependent on instrument model, sensor element, accuracy class and materials coming into contact with the medium). Accuracy classes AA, A and B apply to all resistance thermometers. They are available with a tolerance value to IEC 60751.

Usage limitations and accuracy of platinum resistance thermometers per EN 60751: 2008
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FAQ
All FAQ

What minimum insertion lengths are recommended, as a rough guide, for protection tubes in order to minimise the heat dissipation error?

for gaseous media: 15 ... 20 x protection tube diameter
for liquid media: 5 ... 10 x protection tube diameter
for solid media: 3 ... 5 x protection tube diameter
(these standard values are only valid for static mediaThe gap between the protection tub ... More

Why should Pt100 measuring circuits with reduced tolerance class A or AA per DIN EN 60751 be used in at least a 3- or 4-wire connection?

The 2-wire connection is not permissible for classes A and AA per DIN EN 60751 since here the internal lead resistance of the wires is added to the measured value. This will usually exceed the specified tolerance for the temperature sensor. A measurement of the cab ... More

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