Tubes; microwave (for example klystrons, travelling wave tubes, carlinotrons), excluding magnetrons and grid-controlled tubes

HS v2022 Code: 854079

About tubes; microwave (for example klystrons, travelling wave tubes, carlinotrons), excluding magnetrons and grid-controlled tubes

HS code 854079 covers a range of specialized microwave tubes, including klystrons, travelling wave tubes, and carlinotrons. These tubes play a crucial role in various industries, such as telecommunications, radar systems, and scientific research. They are essential components in the transmission and amplification of high-frequency electromagnetic signals, enabling advancements in communication technologies and scientific instrumentation.

Production process

The production of microwave tubes involves complex manufacturing processes. Key steps include the fabrication of the vacuum envelope, the installation of the cathode, grid, and anode structures, and the precise alignment of the various components. Specialized techniques, such as electron beam welding and high-vacuum sealing, are employed to ensure the integrity and performance of these delicate devices.

Production inputs

The manufacture of microwave tubes requires a range of specialized inputs, including high-purity metals, ceramics, and glass components. Sophisticated machinery, such as vacuum chambers, electron beam welding equipment, and precision measurement tools, are also essential for the production process. Additionally, skilled technicians and engineers are necessary to oversee the intricate assembly and testing procedures.

Production outputs

Microwave tubes produced under HS code 854079 find applications in a variety of industries. They are commonly used in 851711 Telephone sets and 851762 Machines for the reception, conversion and transmission or regeneration of voice, images or other data, including switching and routing apparatus, enabling the transmission and amplification of high-frequency signals. These tubes are also integral components in 852610 Radar apparatus, 901380 Optical devices, appliances and instruments, n.e.c. in chapter 90, and scientific research equipment.

Revisions to 854079

Classification codes are adjusted frequently. The code may have been revised or replaced between system versions. The table below shows the history (newest to oldest) of the code 854079. The most recent 1 version of this code (854079) is in the HS v2022 system (this version):

This page shows the most recent version of code 854079.

Family tree for tubes; microwave (for example klystrons, travelling wave tubes, carlinotrons), excluding magnetrons and grid-controlled tubes

    graph LR
    A["<a href='/classifications/hs/v2022/85'>85: Electrical machinery and equipment and parts thereof; sound recorders and reproducers; television image and sound recorders and reproducers, parts and accessories of such articles</a>"]
A --> B["<a href='/classifications/hs/v2022/8540'>8540: Thermionic, cold cathode or photo-cathode valves and tubes (e.g. vacuum, vapour, gas filled valves and tubes, mercury arc rectifying valves and tubes, cathode-ray and television camera tubes)</a>"]
B --> C["<a href='/classifications/hs/v2022/854079'>854079: Tubes; microwave (for example klystrons, travelling wave tubes, carlinotrons), excluding magnetrons and grid-controlled tubes</a>"]

    B --> D["<a href='/classifications/hs/v2022/854011'>854011: Tubes; cathode-ray television picture tubes, including video monitor cathode-ray tubes, colour</a>"]
B --> E["<a href='/classifications/hs/v2022/854012'>854012: Tubes; cathode-ray television picture tubes, including video monitor cathode-ray tubes, monochrome</a>"]
B --> F["<a href='/classifications/hs/v2022/854020'>854020: Tubes; television camera tubes, image converters and intensifiers, other photo-cathode tubes</a>"]
B --> G["<a href='/classifications/hs/v2022/854040'>854040: Tubes; data/graphic display tubes, monochrome; data/graphic display tubes, colour, with a phosphor dot screen pitch smaller than 0.4mm</a>"]
B --> H["<a href='/classifications/hs/v2022/854060'>854060: Tubes; cathode ray, n.e.c. in heading no. 8540</a>"]
B --> I["<a href='/classifications/hs/v2022/854071'>854071: Tubes; microwave, magnetrons, excluding grid-controlled tubes</a>"]
B --> J["<a href='/classifications/hs/v2022/854081'>854081: Valves and tubes; receiver or amplifier</a>"]
B --> K["<a href='/classifications/hs/v2022/854089'>854089: Valves and tubes; n.e.c. in heading no. 8540</a>"]
B --> L["<a href='/classifications/hs/v2022/854091'>854091: Tubes; parts of cathode-ray tubes</a>"]
B --> M["<a href='/classifications/hs/v2022/854099'>854099: Valves and tubes; parts of the valves and tubes of heading no. 8540, excluding parts of cathode-ray tubes</a>"]

    

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    classDef highlight color:#000,fill:#fff,stroke:#000,stroke-width:5px



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class C level6
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class I level6
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class K level6
class L level6
class M level6

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