So-called ABS sensor, essentially consisting of a plastic housing with a 90 ° angled cable connection, a fastening eyelet and an approx. 470 mm long connection cable with two fastening elements and a two-pole connection plug (see example in the appendix). The sensor delivers a signal proportional to the wheel speed and transmits this to a higher-level control unit (not the subject of this BTI decision). The goods are classified as "devices for measuring or testing, in Chapter 90 neither mentioned nor included, other than geometric values, none Balancing machine, test stand or optical device "queued.
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[1][1]. DE27726/16-1#515253
PASSIVE ABS SENSOR. TWO WIRES; ONE FOR SIGNAL AND FOR ONE EARTH. SUITABLE FOR VEHICLES EQUIPPED WITH METAL TOOTHED TYPE RING ON THE WHEEL HUB ASSEMBLY
[1][1]. GB502013522#410370
The merchandise under consideration is described as a automotive wheel speed sensor, which is comprised of multiple integrated circuit sensors enclosed within a plastic housing. The sensor acts as a transducer, in that it senses the change in a magnetic field, converts this to a digital signal, and sends this signal to another unit for interpretation. The subject sensor is meant to be placed within the wheel assembly of a vehicle in order to detect the speed of the wheel as well as road surface vibrations. This information is sent digitally to the vehicle’s Electronic Control Unit for use in the brake and road noise management systems.
[1] Please importantly note that only the relevant portion of the related is displayed above. You may refer to the said customs ruling for the entire ruling explanation.
[1]. https://rulings.cbp.gov/ruling/N321130
The items concerned are anti-lock break sensors. The model numbers are: MR569412, MR307039, MR307038, MR128680 and MR128681. These devices are wheel speed sensors used in conjunction with an automobile’s anti-lock brake system (ABS). These wheel speed sensors are comprised of a permanent magnet within a coil of wire encased in an external housing. The ABS sensors include a wire harness which connects to the anti-lock brake system’s electronic control unit. (ABS-ECU). The purpose of the ABS Sensors is to assist in detecting the differences in the rotational speed of the wheels. The ABS Sensors are mounted by the wheels or the differential in close proximity to a toothed hub. This toothed hub rotates along with the wheels/differential, at wheel speed. As the teeth of the toothed hub rotate past the tip of the sensor, a magnetic field builds which in turn generates AC voltage. The AC voltage signal is sent to the Electronic Control Unit which interprets it as the speed of the wheel. The faster the toothed hub rotates the greater the voltage. The ABS-ECU compares the signals from each wheel and determines the need for ABS activation. The ABS-ECU determines the amount of hydraulic fluid that flows to each wheel cylinder and therefore controls the braking speed of each wheel. The maintenance of a uniform wheel rotational speed is what allows the ABS to perform its anti-skid function.
[1] Please importantly note that only the relevant portion of the related is displayed above. You may refer to the said customs ruling for the entire ruling explanation.
[1]. https://rulings.cbp.gov/ruling/N009077