Vemo V25-72-0068 Sensor, wheel speed

Vemo V25-72-0068 Sensor

The Vemo V25-72-0068 is a high‑performance wheel speed sensor designed for automotive applications that require precise measurement of rotational velocity. It serves as the core component in anti‑lock braking systems (ABS), electronic stability programs (ESP), traction control, and other vehicle dynamics modules.

Core Functionality

This sensor converts the mechanical rotation of a wheel into an electrical signal proportional to speed. The output is typically a square wave whose frequency matches the wheel’s rotational frequency. By counting pulses over time, the vehicle control unit can calculate instantaneous speed, detect wheel slip, and trigger corrective actions.

Key Technical Specifications

• Model Number: V25-72-0068
• Type: Hall‑effect or magnetic inductive sensor (depending on variant)
• Output Signal: Square wave, 5 V logic level
• Operating Temperature Range: –40 °C to +120 °C
• Power Supply: 12–14 V DC (typical automotive battery voltage)
• Signal Frequency: Up to 10 kHz (suitable for high‑speed wheels)
• Mounting Interface: Standard sensor bracket compatible with most rear‑wheel assemblies
• Dimensions: Approx. 35 mm × 25 mm × 15 mm (varies slightly by variant)
• Weight: ~30 g
• Material: High‑grade steel housing with corrosion protection coating

Design Features and Advantages

The V25-72-0068 incorporates several design elements that enhance reliability and performance:

• Robust Housing: The sensor’s enclosure is engineered to resist impact, vibration, and exposure to road salts and chemicals.
• Low Power Consumption: Optimized circuitry ensures minimal draw from the vehicle’s electrical system, preserving battery life.
• High Signal Integrity: Built‑in filtering reduces noise, providing clean pulses even under harsh electromagnetic environments.
• Fast Response Time: Rapid detection of wheel speed changes allows for immediate ABS or ESP intervention during critical driving moments.
• Compact Size: The small footprint facilitates installation in tight spaces typical of modern rear‑wheel assemblies.

Compatibility and Application Scope

This sensor is specifically engineered for use with the Ford Street KA series, including the 2‑door coupe and 3‑door hatchback variants. However, due to its standard interface and signal characteristics, it can also be adapted to other vehicles that employ similar wheel speed sensing architectures.

• Vehicle Models: Ford Street KA (rear wheels), Ford Ka (rear axle)
• Systems Supported: ABS, ESP, traction control, hill‑start assist, and other vehicle stability modules that rely on wheel speed data.
• Installation Environment: Suitable for both front and rear wheel assemblies where a magnetic or Hall sensor is required.

Installation Guidelines

Proper installation ensures optimal performance and longevity. Follow these steps to mount the V25-72-0068 correctly:

1. Preparation: Disconnect the vehicle battery to prevent accidental electrical discharge.
2. Remove Old Sensor: Unscrew the existing wheel speed sensor from its bracket. Carefully detach any wiring harnesses, noting connector orientation.
3. Align Magnetic Ring or Hall Element: Position the sensor so that its magnetic field aligns with the wheel’s toothed rim or magnetic strip. The sensor should sit flush against the mounting surface.
4. Screw Securely: Tighten the mounting screws to the manufacturer’s torque specification (typically 10–15 Nm). Avoid overtightening, which could damage the housing.
5. Reconnect Wiring: Attach the sensor harness, ensuring a secure connection. Verify polarity if applicable.
6. Test Functionality: Reconnect the battery and activate the vehicle’s ABS or ESP system. Use diagnostic tools to confirm that wheel speed pulses are being detected correctly.

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