HS Code | Official Doc | Tariff Rate | Origin | Destination | Effective Date |
---|---|---|---|---|---|
8543708800 | Doc | 30.0% | CN | US | 2025-05-12 |
8543906800 | Doc | 55.0% | CN | US | 2025-05-12 |
9029908080 | Doc | 55.0% | CN | US | 2025-05-12 |
9029908040 | Doc | 55.0% | CN | US | 2025-05-12 |
9031808060 | Doc | 30.0% | CN | US | 2025-05-12 |
9031497000 | Doc | 55.0% | CN | US | 2025-05-12 |
Encoder
An encoder is a device, circuit, transducer, or algorithm that converts information from one format or code into another, typically for transmission or storage. The specific characteristics of an encoder depend heavily on the type of information being encoded and the intended application.
Material
Encoders are constructed from a variety of materials depending on their function and environment. Common materials include:
- Silicon: Predominantly used in digital encoders (integrated circuits) due to its semiconductor properties.
- Metals (e.g., Aluminum, Stainless Steel): Used in mechanical encoders for shafts, disks, and housings, offering durability and precision.
- Plastics (e.g., Polycarbonate, ABS): Employed for housings, disks (in some optical encoders), and other non-critical components.
- Optical Materials (e.g., Glass, Acrylic): Used in optical encoders for creating patterns and transmitting light signals.
- Magnetic Materials (e.g., Ferrite, Steel): Utilized in magnetic encoders for creating magnetic fields and sensing patterns.
Purpose
The primary purpose of an encoder is to convert information into a standardized format suitable for a specific process. This can include:
- Position/Motion Encoding: Converting physical position or movement into digital signals.
- Data Conversion: Transforming data into a code for secure transmission or storage.
- Signal Modulation: Altering a carrier signal to encode information.
- Analog-to-Digital Conversion: Converting continuous analog signals into discrete digital values.
Function
Encoders function by detecting a physical parameter and translating it into an electrical or digital output. The specific mechanisms vary:
- Mechanical Encoders: Use rotating shafts with patterned disks to generate pulses as they rotate, indicating position or speed.
- Optical Encoders: Employ light sources and photodetectors to read patterns on a rotating disk, providing precise position or speed data.
- Magnetic Encoders: Utilize magnetic fields and sensors to detect position or movement based on magnetic patterns.
- Digital Encoders (ICs): Implement logic circuits to convert binary codes or other input signals into different formats.
- Linear Encoders: Measure linear position using a scale with markings and a reading head.
- Absolute Encoders: Provide a unique code for each position, enabling absolute position determination.
- Incremental Encoders: Output pulses relative to movement, requiring a reference point for position tracking.
Usage Scenarios
Encoders are used in a wide range of applications:
- Robotics: Position and velocity feedback for robot joints and actuators.
- Industrial Automation: Controlling motors, conveyors, and other automated equipment.
- CNC Machines: Precise positioning of cutting tools and workpieces.
- Printers: Controlling print head movement and paper feed.
- Computer Mice: Tracking mouse movement.
- Automotive Systems: Steering angle sensors, throttle position sensors, and ABS systems.
- Medical Equipment: Precise positioning of imaging devices and surgical instruments.
- Aerospace: Flight control systems and navigation equipment.
- Data Storage: Encoding data for hard drives, optical discs, and other storage media.
Common Types
- Rotary Encoders: Measure rotational position and speed. Subtypes include:
- Absolute Rotary Encoders: Provide a unique code for each position.
- Incremental Rotary Encoders: Output pulses relative to movement.
- Linear Encoders: Measure linear position.
- Optical Encoders: Utilize light to detect position.
- Magnetic Encoders: Utilize magnetic fields to detect position.
- Digital Encoders (ICs): Implement logic circuits for data conversion.
- Gray Code Encoders: Output a code that minimizes errors during position changes.
- Binary Encoders: Output a standard binary code.
Based on the material and function, an encoder is a device used to convert motion or position into an electrical signal. Here are the relevant HS codes found within the provided reference material:
-
8543708800: Electrical machines and apparatus, having individual functions, not specified or included elsewhere in this chapter; parts thereof: Other machines and apparatus: Other: Electrical machines with translation or dictionary functions; video game console controllers which use infrared transmissions to operate or access the various functions and capabilities of the console.
- 85: Electrical machinery and equipment.
- 43: Electrical machines and apparatus having individual functions, not specified or included elsewhere.
- 70: Other machines and apparatus.
- 88: Other.
- This code covers a broad range of electrical machines, and if the encoder is part of a larger machine with translation or dictionary functions, or is a controller utilizing infrared transmission, it may fall under this classification.
-
9029908080: Revolution counters, production counters, taximeters, odometers, pedometers and the like; speedometers and tachometers, other than those of heading 9014 or 9015; stroboscopes; parts and accessories thereof: Parts and accessories: Other Other.
- 90: Instruments and apparatus for measuring, checking, testing, navigating or calculating.
- 29: Revolution counters, production counters, etc.
- 90: Parts and accessories.
- 80: Other.
- If the encoder functions as a revolution or production counter, this HS code may be applicable.
-
9031808060: Measuring or checking instruments, appliances and machines, not specified or included elsewhere in this chapter; profile projectors; parts and accessories thereof: Other instruments, appliances and machines: Other Equipment for testing the characteristics of internal combustion engines: For testing electrical characteristics.
- 90: Instruments and apparatus for measuring, checking, testing, navigating or calculating.
- 31: Measuring or checking instruments, appliances and machines.
- 80: Other instruments, appliances and machines.
- 60: Equipment for testing electrical characteristics.
- If the encoder is used for testing electrical characteristics, this HS code may be applicable.
According to the provided reference material, the HS code options related to 'encoder' are limited, with only the following 3 found.