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THERMOCOUPLES
These electrical temperature sensors are produced following the designs of DIN 43772 and are used in machines, systems and apparatus engineering.
- Other versions are also available on request (different dimensions, materials, thermocouples)
- On request, also available with internationally recognised UKAS certificate
The measuring procedure of thermocouples utilises the effect that a temperature dependent tension develops at the junction between two different metals. This tension is known as thermo-electromotive voltage and increases as the temperature increases in the case of all thermocouples.
The entire temperature sensor is generally described as a thermocouple. The actual measuring element, the so called thermocouple pair, is formed from the two different conductors (+ and - poles), the thermocouple wires.
Advantages
- Comparatively small design
- Some have a greater temperature range
- Can be less sensitive to mechanical loads
Standards
The standards IEC 584 resp. EN 60584, define the requirements for thermocouples.
In particular, the temperature dependent thermo-electromotive voltages are defined, as well as deviation limits and to some extent the material composition of thermocouple wires.
The following thermocouples are standardized and defined:
- Cu-CuNi (T) Copper-Constantan
- Fe-CuNi (J) Iron-Constantan
- NiCr-CuNi (E) Chromel-Constantan
- NiCr-Ni (K) Chromel-Alumel
- NiCrSi-NiSi (N) Nicrosil-Nisil
- Pt10Rh-Pt (S) PlatinumRhodium-Platinum
- Pt13Rh-Pt® PlatinumRhodium-Platinum
- Pt30Rh-Pt6Rh(B) PlatinumRhodium-Platinum
