Find HS Code and trade information for speed sensor

Speed Sensor

A speed sensor is a device that measures the rate of rotation of an object. This rate is typically expressed in revolutions per minute (RPM), or angular velocity. These sensors are widely used in a variety of applications to provide feedback for control systems, monitoring, and safety features.

Materials

Speed sensors utilize diverse materials depending on the specific technology employed. Common materials include:

• Magnetic Materials: Used in inductive, Hall effect, and magneto-resistive sensors (e.g., neodymium magnets, ferrite cores).
• Semiconductors: Silicon-based components are fundamental in optical and Hall effect sensors.
• Metals: Aluminum or stainless steel for housings and mechanical components.
• Plastics/Polymers: Used for housings, insulation, and encapsulation.
• Optical Components: Glass or acrylic lenses and light sources (LEDs) in optical sensors.

Purpose

The primary purpose of a speed sensor is to detect and measure rotational speed. This information is then used for:

• Engine Control: Monitoring crankshaft and camshaft position and speed for ignition timing, fuel injection, and emissions control.
• Transmission Control: Determining vehicle speed for optimal gear selection and shift scheduling.
• Anti-Lock Braking Systems (ABS): Detecting wheel speed to prevent wheel lockup during braking.
• Traction Control Systems: Monitoring wheel speed to manage wheel slip during acceleration.
• Automotive Speedometers: Providing the driver with vehicle speed information.
• Industrial Automation: Controlling the speed of motors, conveyors, and other rotating machinery.
• Robotics: Providing feedback for precise motor control and positioning.

Function

Speed sensors operate based on several different principles:

• Inductive Sensors: These sensors detect the passing of ferrous metal teeth on a rotating target (e.g., tone ring) by generating a voltage change in a coil due to changes in magnetic flux.
• Hall Effect Sensors: These sensors measure the change in voltage produced when a magnetic field intersects a semiconductor material. A magnet attached to the rotating object causes the voltage to vary as it passes the sensor.
• Magneto-resistive Sensors: Similar to Hall effect sensors, these sensors measure changes in resistance due to magnetic fields. They often offer higher sensitivity.
• Optical Sensors: These sensors use a light source and photodiode to detect the interruption of a light beam by teeth or markings on a rotating object.
• Variable Reluctance Sensors: These sensors generate a voltage proportional to the rate of change of magnetic flux as teeth pass a coil.

Usage Scenarios

• Automotive: Engine speed, wheel speed, transmission speed.
• Industrial Machinery: Motor speed control, conveyor belt speed monitoring, turbine speed measurement.
• Robotics: Joint speed control, motor feedback.
• Aerospace: Turbine engine speed monitoring, propeller speed measurement.
• Fitness Equipment: Treadmill speed measurement, exercise bike cadence detection.
• Medical Devices: Monitoring the speed of pumps, motors, and other rotating components.

Common Types

• Variable Reluctance Sensors (VRS): Older technology, less accurate, but cost-effective.
• Hall Effect Sensors: Widely used, reliable, and relatively inexpensive. Available in both analog and digital outputs.
• Inductive Sensors: Robust and accurate, often used in harsh environments.
• Optical Sensors: High accuracy and resolution, but sensitive to contamination.
• Magneto-resistive Sensors: High sensitivity, often used in precision applications.
• Encoder: Provide precise position and speed information, using optical or magnetic principles. Can be absolute or incremental.
• Tooth Wheel Sensors: Commonly used for crankshaft and camshaft position sensing in engines.

Speed sensors fall under several potential classifications based on their specific function and application. Here's a breakdown of relevant HS codes based on the provided information:

• 9029204080: This code covers 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: Speedometers and tachometers; stroboscopes: Other speedometers and tachometers Other. This is applicable if the speed sensor is integrated into a speedometer or tachometer system. The two-digit sections represent:

  • 90: Optical, precision, measuring, checking, testing, navigating and control instruments and apparatus; parts and accessories thereof.
  • 29: Revolution counters, production counters, taximeters, etc.
  • 20: Speedometers and tachometers; stroboscopes.
  • 40: Other speedometers and tachometers.
  • 80: Other.

• 9029206000: This code covers 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: Speedometers and tachometers; stroboscopes: Stroboscopes. If the speed sensor is part of a stroboscope system, this code applies. The two-digit sections are the same as above, with 20 representing Speedometers and tachometers; stroboscopes and 60 representing Stroboscopes. Note that this code has a specific tariff rate of 16¢ each + 2.5% + 55.0%.

• 8543708000: This code covers Electrical machines and apparatus, having individual functions, not specified or included elsewhere in this chapter; parts thereof: Other machines and apparatus: Other: Microwave amplifiers. While less direct, if the speed sensor is an electrical machine with a specific function not elsewhere classified, and functions as a microwave amplifier, this code could be applicable. The two-digit sections represent:

  • 85: Electrical machinery and equipment.
  • 43: Electrical machines and apparatus.
  • 70: Other machines and apparatus.
  • 80: Other.

According to the provided reference material, the HS code options related to 'speed sensor' are limited, with only the following 3 found.