Thermocouples for Industrial Furnaces
High-Temperature Furnace Temperature Senors
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.