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Parking Sensors

CISBO Parking Reversing 4 Sensors with buzzer and LED displayer

The Cisbo 4 Sensor Parking Kit is a popular aftermarket reversing aid designed to help drivers navigate tight spaces and avoid collisions. It uses ultrasonic technology to detect obstacles and provides both visual and audible feedback.

Below is a detailed breakdown of the kit's features, technical specifications, and what is typically included in the box.

Key Features

  • Four Ultrasonic Sensors: High-sensitivity "electronic eyes" that are mounted into the rear bumper to provide wide-angle coverage.

  • Dual Alert System:
    Visual:     A dashboard-mounted LED/LCD display shows the exact distance to an obstacle in meters (usually down to 0.3m).
    Audible: A built-in buzzer emits "Bi-Bi" beeps that increase in frequency as you get closer to an object, turning into a solid tone when you are in the "Danger" zone.

  • Directional Indicators: Most Cisbo displays feature left and right bars to show which side of the vehicle the obstacle is on.

  • Weatherproof Design: Sensors are designed to operate in rain, snow, and extreme temperatures (typically $-20^\circ\text{C}$ to $+70^\circ\text{C}$).

  • Automatic Activation: The system powers on automatically when the vehicle is shifted into reverse gear.

Technical Specifications

FeatureDetailsRated Voltage12V DC (Operating range 9V–16V)Detection Distance0.3m to 2.0mUltrasonic Frequency40kHzDetection AngleH > $60^\circ$, V > $60^\circ$Power ConsumptionMax 3.6W

Kit Contents

Most Cisbo 4 sensor kits come as a complete "DIY" package, including:

  1. Main Control Box: The "brain" of the system, usually tucked away in the boot near the reversing light wiring.

  2. 4x Reversing Sensors: Available in various colors (Black, Silver, White, etc.) and can usually be painted to match your car.

  3. LED/LCD Display Unit: Includes a long cable to run from the rear of the car to the dashboard.

  4. Hole Saw Bit: A specialized drill bit (typically 18mm or 21mm) to ensure you cut the perfect size holes in your bumper.

  5. Wiring Loom: Power cables that tap into your car's 12V reverse light circuit.

  6. Adhesive Pads: For mounting the control box and the display.

Distance Alert Stages

The system typically communicates proximity through stages:

  • Safe (1.6m – 2.0m): No sound or slow intermittent beeping.

  • Caution (1.0m – 1.5m): Slower "Bi... Bi... Bi" sound.

  • Alarm (0.5m – 0.9m): Rapid "Bi-Bi-Bi" sound.

  • Danger (0.0m – 0.4m): Continuous solid tone ("Biiiiiiii"); the display will often flash or show "Stop."

Note: While this kit is a great safety aid, it is important to keep the sensor heads clean. Dirt, mud, or heavy frost can occasionally trigger "ghost" readings or reduce the sensitivity of the ultrasonic waves.
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