High Temperature Thermocouple for Furnaces

High-Temperature Furnace Temperature Senors

High temp industrial furnace thermocouple temperature sensor

An electrical device for high-temperature laboratory furnaces, a thermocouple, also known as a temperature sensor, gauges a wide range of temperature changes. Two different electrical conductors form electrical junctions to produce a voltage at a single junction. This causes a thermoelectric effect to interpret varying measurements of temperatures.

Several types of thermocouples exist as some applications require a certain type of thermocouple. For commercial and industrial applications, Sentro Tech offers the following thermocouples:

  • Type K Thermocouple
  • Type S Thermocouple
  • Type R Thermocouple

Type K Thermocouple

Most commonly used, the Type K thermocouple measures temperatures from -300°F to +2460°F. This magnetic thermocouple, that’s typically made of nickel, changes its output when the material reaches its Curie point at around 365°F. The Type K thermocouple functions very well in oxidizing atmospheres, except when exposed to hydrogen (which can cause green rot).

Type S Thermocouple

High-temperature applications that reach up to around 2900°F use the Type S thermocouple. Lower temperature processes also use Type S thermocouples because of its accuracy and stability. High-temperature procedures, especially in the biotech or pharmaceutical industries, most frequently use the Type S thermocouple. Like all platinum-type thermocouples, always use a ceramic tube to protect the Type S thermocouple.

Type R Thermocouple

Like the Type S, the Type R thermocouple is used in high-temperature applications reaching up to 2900°F. However, never use the Type R in reducing atmospheres. And as an all platinum-type, a ceramic tube should always protect Type R thermocouples.

Type B Thermocouple

Temperature applications of up to around 3200°F use the Type B thermocouple. Use this platinum-type of thermocouple in oxidizing or inert atmospheres with applications ranging from 1000°F to 3100°F. Never use Type B thermocouples in reducing atmospheres. Always use a ceramic tube to protect this type of thermocouple.

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