Application Principles of High Temperature Precious Metal Thermocouples

Application Principles of High Temperature Precious Metal Thermocouples

When it comes to high-temperature precious metal thermocouples, they are all temperature measuring instruments manufactured using the principles of physics. The main characteristic of thermocouples is their high temperature resistance. The physical and mechanical properties of thermocouples are commonly used. The physical and aging properties of the insulation layer and sheath of the compensation line should meet the requirements.

The moisture and heat resistant compensation wire should be able to withstand an ambient temperature of 40 ± 2 ℃ and a relative humidity of 95 ± 3%. After 24 hours of wet resistance test, the insulation resistance between the thermocouple compensation wire cores and between the wire cores and the shielding layer shall not be less than 25m Ω/m.

Thermocouples should undergo a 24-hour thermal resistance test at 220 ± 5 ℃. After bending 180 degrees on a cylinder with a diameter of 5 times the sample, there should be no cracks on the surface. The insulation resistance between the compensating wire cores and between the core wires and the shielding layer shall not be less than 25m Ω/m. The compensation wire commonly used for the performance of thermocouple low-temperature winding should undergo a -20 ℃ low-temperature winding test, and the insulation layer on the sample winding test rod should be visually free of cracks.

Explosion proof electric heater is an energy source that converts energy consumption into thermal energy!

Explosion proof electric heater is a form of heating the material being heated by converting energy consumption into thermal energy. In work, the low-temperature fluid medium enters its input port through a pipeline under pressure, and along the special heat exchange channel inside the electric heating container, a path designed based on the principles of fluid thermodynamics is used to carry the high-temperature heat energy generated during the operation of the electric heating element, thereby increasing the temperature of the heating medium. The high-temperature medium required for the process is obtained at the outlet of the electric heater.

The internal control system of the electric heater automatically adjusts the output power of the electric heater based on the temperature sensor signal at the output port, so that the temperature of the medium at the output port is uniform; When the heating element exceeds the temperature limit, the independent overheating protection device of the heating element immediately cuts off the heating power supply to avoid coking, deterioration, and carbonization of the heating material due to overheating, which may cause the heating element to burn out and effectively extend the service life of the power heater.

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