[Patented Product Introduction] High-Temperature Corrosion-Resistant Thermocouple
2021-04-15
“The High-Temperature Corrosion-Resistant Thermocouple and Its Manufacturing Method” is an invention patent applied for by Suno-Meng Technology Co., Ltd. (Application No. 2021101038576).
It features electrodes made from high-purity precious metals, with a special material—highly resistant to high temperatures and boasting excellent thermal conductivity—deposited on the outer layer of the electrodes. This coating provides outstanding protection against the effects of reducing and corrosive gases, thereby significantly extending the service life of the thermocouple wires. The outer tube is crafted from premium heat-resistant stainless steel and high-density ceramic materials, enabling it to withstand both high-temperature shocks and exposure to reducing and corrosive gases. The product finds extensive application in industries and fields such as sulfur reaction furnaces, powder metallurgy, sintering furnaces, vacuum furnaces, glass manufacturing, iron and steel coal processing, and energy and environmental protection.
Technical Background
As a commonly used measurement device, thermocouples can directly measure the temperatures of vaporization furnaces, sulfurization furnaces, and similar equipment. However, the conventional thermocouple sheath is prone to cracking under the impact of rapid temperature changes—both sudden heating and cooling—which may allow corrosive and reducing gases to penetrate the thermocouple interior, leading to poisoning, corrosion, and damage of the precious-metal thermocouple elements and significantly shortening its service life.
Invention Content
A high-temperature, corrosion-resistant thermocouple comprising a junction box structure, an insulating protective casing, and a thermocouple wire assembly.
The thermocouple wire structure comprises a precious-metal thermocouple wire and an atomic-level protective film sputter-deposited onto the surface of the precious-metal thermocouple wire. Both the high-temperature resistance and corrosion resistance of the atomic-level protective film are superior to those of the precious-metal thermocouple wire.
The aforementioned high-temperature corrosion-resistant thermocouple features a protective film at the atomic level, which exhibits superior high-temperature resistance and corrosion resistance compared to noble-metal thermocouple wires. As a result, the thermocouple wire structure maintains relatively stable performance even in oxidizing, reducing, or acidic/alkaline atmospheres. During use, even if acidic or reducing gases enter the insulating protective casing, the thermocouple wire structure is unlikely to suffer from poisoning or corrosion damage, thereby effectively extending the service life of the high-temperature corrosion-resistant thermocouple. Moreover, since the atomic-level protective film is deposited onto the noble-metal thermocouple wire via sputtering, it exhibits strong interpenetration with the noble-metal wire itself, resulting in an exceptionally robust bond. Consequently, even after prolonged use, the atomic-level protective film remains firmly attached to the noble-metal thermocouple wire, further enhancing the thermocouple's service life.
Product Features
◎ The electrodes are made from high-purity precious metals, and their outer layer is coated with a special protective material, ensuring a long service life.
◎ The outer casing is made of high-quality, heat-resistant stainless steel and high-density ceramic materials, which can withstand high-temperature shocks as well as reducing and corrosive gases.
◎ High temperature measurement accuracy, stable and reliable operation, and easy installation and use.
◎ A complete range of product specifications with broad applicability.
Technical Parameters
◎ Measurement range: (0～800～1000～1300～1600～1800)℃.
◎ Calibration classes: E, K, S, B.
◎ Permissible deviation: ±1.5℃, ±2.5℃.
◎ Length dimensions: Customizable.
Contact Us
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Phone : +86-400-002-1378
Email : business@chnsnm.com
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