Thermocouple cable
Temperatures are an important factor in many areas concerning technical productions, scientific research, environment.
It’s a thermo-dynamic variable that defines the heat contained in a material. Material strength changes according to temperature, and the performance of materials has to be checked at different temperatures, to obtain defined parameters of working temperature: water’s parameters of working temperature could be, for example, the freezing and the boiling points.
To find temperature ratings we could measure the electrical resistance on metallic conductors (electrical thermometer) or electromotive force (thermocouple). A thermocouple consists in a thermometer itself and the value of the electromotive force (EMF) is determined by the difference between the measuring (or hot) junction and the reference (or cold) junction, which normally is a given temperature (0°C) so that the emf generated depends solely on the temperature of the measuring junction.
Conductor Materials
Depending on conductor materials we differentiate cable construction in:
- Thermocouple
- Extension
- Compensating
Cables made of the same material as the original ones are called thermocouple or extension cables when used to link up the thermocouple with the connection head, whereas cables made of substitutive material are known as compensating cables.
Thermocouple cables
Thermocouple cables are made of the same material as the original thermocouple and are tested at the same temperature. These special cables are manufactured according to customer’s requests.
Insulation and jacket, by ceramic fibre, glassfibre, fluoropolymer, silicone rubber, are suitable for indoor use.
Extension cables
Extension cables are made of material identical to the thermocouple original one. They are identified with the letter “X”, according to DIN IEC 60584, placed near the code letter identifying the thermocouple. They are normally tested at a temperature range from 0°C to 200°C.
Insulation and jacket by fluoropolymers, silicon rubber, thermoplastic compounds, are suitable for indoor and outdoor use.
Compensating cables
Compensating wire and strands are made of alloys that do not have to be identical to the corresponding thermocouple. Substitutive material implies nevertheless that the thermoelectric characteristics have to be the same. They are identified with the letter “C”, according to DIN IEC 60584, placed near the code letter identifying the thermocouple.
Insulation and jacket by fluoropolymer, silicon rubber, thermoplastic compound, are suitable for indoor and outdoor use.
