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① Thermocouple wire

A thermocouple wire is a product made of using same elements with each thermocouple type. it is used as a wire type thermocouple and connecting wire for space is small or far with data logger.
Depending on the environment of facilities, a insulator's material is changed such as PVC, FEP, Silicon, Kapton, Glass, Silica, Alumina. Each of insulator has different characteristics, so it should be selected in consideration of the operating temperature, water resistance, oil resistance, etc.
In the thermocouple wire there's 2 grade of wire. first thermocouple grade wire second Extension grade wire.
A thermocouple grade wire is made of the same material with K-Type (Chromel-Alumel), J-Type (Iron-Constantan), T-Type (Copper-Constantan)... so thermocouple wire's price is higher than extension wire over___ so many customers use extension wire as an alternative of thermocouple grade wire.
Because extension wire is consist of copper and nickel, it shows similar thermo-electromotive force.

② RTD wire

A RTD wire is a product made of using Nickel, Copper element. it is used as a connecting wire for space is small or far with data logger.
RTD measures the temperature according to a resistance value so, many customer use copper+nickel plated wires with low electrical resistance. Depending on the environment of facilities, a insulator's material is changed such as PVC, FEP, Silicon, Kapton, Glass, Silica, Alumina. Each of insulator has different characteristics, so it should be selected in consideration of the operating temperature, water resistance, oil resistance, etc.

③ Thermocouple Wire Insulation Specifications / Thermocouple Wire Color Code