Platinum Thermocouple Wires

Thermocouples Defined

Thermocouples are sensors used to measure temperature. Thermocouple wires are usually made of two dissimilar metals joined at one sending end. A thermocouple wire functions by forming a sensing point where the cold junction compensation or CJC end can be read.

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There are many types of thermocouple wires, and these types are used for different purposes. Thermocouple types are named according to alphabets such as B, R, S, J, K, T, E, etc. The types differ according to the metal content of the wire.

The Platinum Wire

Among the different types of wires, one of the most favoured types is called the platinum thermocouple wire. The conductors of this type are often made of platinum or platinum-rhodium alloys for its conductors. Such wires are classified into three types. Class B PT wires are suitable for use in temperatures up to 1800 °C. They produce a similar output between 0 to 42 °C. As such, they are suitable for use below 50 °C. The Class R PT wires are used in temperatures up to 1600 °C. Class S PT wires are among the purest of PT wire types. It is similar to the class R in its temperature limit but is used as the calibration standard for the melting point of Argentum or gold, which is 1064.43 °C.

Uses

A Platinum thermocouple wire is often used in high-temperature measurements. Unlike other thermocouple mixes, the PT wire made from platinum is reserved for use in costly projects where high-temperature measurements are expected.

Platinum Thermocouple Wires