Description of the ATC rear sunroof Sensor kit NL0241
The NL0241 – ATC Sunroof Rear Sensor Kit is a vital component in the operational integrity of NOVAL’s marine sliding roof systems. Acting as the “open position sentinel,” it signals to the control system NL0129 the exact moment the sunroof reaches its maximum travel, ensuring:
- Operational safety: Prevents overtravel and mechanical stress on the drive components.
- System longevity: Reduces wear on gears, belts, and actuators by stopping motion precisely.
- Onboard comfort: Guarantees a smooth, noise-free, and consistent opening sequence even in offshore conditions.
Its installation point—next to the roof motor on the central track—has been chosen for optimal detection accuracy and protection from the elements. Built with marine-grade materials, the NL0241 resists vibration, salt spray, and UV degradation.
The complete kit includes:
- ATC rear position sensor (Ref. AT0778)
- Stainless steel A4 fasteners
- Purpose-built bracket
- Pre-cut marine cable for optimal routing leading to a waterproof connection
Whether your vessel navigates calm coastal waters or faces open-sea challenges, this sensor ensures your sliding sunroof system performs flawlessly.
Specifications
- Reference: NL0241
- Function: Roof fully-open position detection for ATC sunroofs
- Sensor model: AT0778
- Kit contents: Sensor, screws, bracket, cable
- Location: Mounted near roof motor on central track
Compatibility
The NL0241 is factory-calibrated for the following NOVAL ATC marine sunroof applications:
- Beneteau – Gran Turismo range with ATC sliding sunroofs
- Beneteau – Flyer 12 (Starboard sunroof sensor)
- Jeanneau – Leader range with ATC sliding sunroofs (Leader 40, Leader 46, etc.)
- Jeanneau – Prestige 440S
- Galeon – 435 GTO with integrated ATC electric sunroof
- Sessa – C42 with hardtop electric sliding roof
Installation / Maintenance
Installation steps:
(Documentation downloadable once your purchased confirmed)
- Cut all electrical power to the roof system before starting.
- Identify mounting location on the central track next to the motor unit.
- Secure bracket with A4 stainless steel screws supplied.
- Route and connect the pre-cut cable to the control unit, ensuring no chafing points.
- Perform a full opening cycle to confirm correct detection.
Maintenance recommendations:
- Inspect biannually for corrosion, cable wear, or connector oxidation.
- Rinse with fresh water after exposure to salt spray; dry with a soft cloth.
- Apply dielectric grease to connectors for enhanced waterproofing.
- Check also the front sensor NL0243 when replacing the rear sensor.
Our review
✔ Pros
- Pinpoint accuracy in roof position detection
- Complete plug-and-play marine kit
- Corrosion-resistant, UV-stable construction
✘ Cons
- Exclusively for NOVAL ATC systems—no cross-platform use
- A faulty sensor disables the opening function until replaced
Conclusion
For yacht owners and professional shipyards, the NL0241 ATC Sunroof Rear Sensor Kit is an essential safeguard for your vessel’s sliding roof. Beyond simply detecting position, it preserves your system’s mechanics, enhances onboard comfort, and ensures safety under all sea conditions. Using an original NOVAL sensor guarantees perfect calibration and reliability—an investment in both performance and peace of mind.
Good to Know
Always use OEM parts for ATC sunroofs; generic sensors risk improper calibration
Correct position sensing reduces strain on actuators, belts, and structural components—especially important in rough seas


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