Thermocouples

Thermocouples are resistance temperature sensors used for measuring extreme temperatures, and they find application in many sectors. These sensors have compact dimensions and very rapid measurement times, and due to their high resistance, thermocouples can also be used in critical conditions. Temperatures measured can reach up to 2500°C, and thanks to their extreme durability and small size, they are among the most commonly used electric resistors for temperature control. ESAF Ltd offers a wide range of thermocouples and thermocouple cables. You will find a selection of high-quality electrical components, providing excellent performance regardless of the application context, all at competitive prices. WHAT ARE THERMOCOUPLES? Thermocouples are transducers, temperature sensors that operate based on the thermoelectric effect. The main advantages of thermocouples are their small size, rapid measurement times, and their ability to be used even at extreme temperatures (depending on the type of thermocouple, temperatures can reach up to 2500°C). TYPES OF THERMOCOUPLES AND COLOUR CODE TABLE Thermocouples are classified based on the types of metals used in their construction. Depending on the metals used, the maximum temperature they can measure will vary, along with different applications and characteristics. • TYPE K THERMOCOUPLES Type K thermocouples are made from nickel-based wires and are the most widely used in production and industrial sectors due to their reliability and cost-effectiveness. Measurement range: -200/+1370°C Colour of Type K thermocouples: Green • TYPE J THERMOCOUPLES Type J thermocouples have a more limited measurement range compared to Type K. The two conductors are made of iron (positive pole) and a nickel-copper alloy (negative pole). Measurement range: -40/+750°C Colour of Type J thermocouples: Black • TYPE N THERMOCOUPLES Type N thermocouples are designed for high temperatures, similar to Type K but more stable and less sensitive to oxidation and extreme external temperatures. Measurement range: -270/+1300°C Colour of Type N thermocouples: Pink • TYPE W3 THERMOCOUPLES Type W3 thermocouples are ideal for very high temperatures, capable of measuring up to 2500°C. They cannot be used in oxidising atmospheres or in contact with air. They are the most advanced and are primarily used in sectors requiring extremely high temperatures. Measurement range: 0/+2500°C Colour of Type W3 thermocouples: Green