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The Design Of Heat Dissipation And Thermal Isolation Systems For High-temperature Pressure Transmitters
High-temperature pressure transmitters refer to specialized transmitters that can directly or indirectly measure the pressure of high-temperature media (typically referring to media temperatures higher than the 85°C or 125°C allowed by standard transmitters).
Main technical advantages:
Remote diaphragm flange type (with capillary/tubing): Completely isolates high temperatures, with the transmitter body operating in a normal temperature environment, ensuring high reliability and long service life.
Integrated high-temperature type (with built-in heat dissipation mechanism): Advantages: Compact structure, installation similar to standard transmitters, no capillary, and faster response.
Water-cooled/air-cooled type: Can handle extreme high temperatures (such as molten metals and glass liquids above 500°C).
Special sensor type: Utilizes high-temperature resistant sensor technology, such as sapphire optical fiber sensors and high-temperature silicon strain gauges, where the sensing elements themselves can operate at even higher temperatures.
Typical high-temperature application scenarios:
Steam systems: Main steam, superheated steam, and reheated steam pipelines of boilers.
Heat transfer medium systems: Heat transfer oil and molten salt pipelines and reactors.
Chemical processes: High-temperature reaction vessels, cracking furnaces, and distillation columns.
Metallurgical industry: Continuous casting, steel rolling, and molten metals.
Energy and power: Gas turbine intake and exhaust, and high-temperature flue gas.
Glass and ceramic industries: Furnace pressure.
High-temperature pressure transmitters are the "thermal protection experts" for solving measurement challenges in special working conditions. The technical core of these devices does not lie in the sensors themselves, but in the ingenious design of the heat dissipation and thermal isolation systems.