Legrand ci-305 Pir Ceiling Occupancy Sensor 1200 Sq Ft 24VDC

Product Description

The LEGRAND ci-305 is a passive infrared (PIR) ceiling-mount occupancy sensor designed for low-voltage commercial lighting control systems. Operating at 24VDC, it provides 360-degree coverage up to 1200 square feet, automatically switching lighting loads on when occupancy is detected and off after the space clears. The sensor features a flat, low-profile ABS housing that mounts flush to the ceiling using included spring clips. Adjustable time delay and sensitivity settings let technicians dial in performance to match the space. A built-in light level sensor prevents the unit from triggering during daylight hours when additional illumination is not needed. Part of the Wattstopper product line, this sensor is intended for licensed electrical contractors working on commercial lighting retrofit and new-construction projects.

The ci-305 is suited for open-plan commercial interiors including offices, conference rooms, corridors, and similar spaces where automatic occupancy-based lighting control is required. It installs on flat ceiling surfaces and is rated for commercial application sectors. A compatible power pack is required for operation and must be sourced separately. The unit ships in white finish to blend with standard commercial ceiling tiles and grid systems. Indicator lights on the sensor body assist with commissioning and troubleshooting during initial setup and periodic service calls.

Key Features

• 360-degree PIR detection coverage up to 1200 square feet
• 24VDC low-voltage operation — power pack required, sold separately
• Adjustable time delay and sensitivity for site-specific tuning
• Built-in light level sensor for daylight-linked occupancy logic
• Indicator lights for field commissioning and diagnostics
• Spring clip mounting hardware included for fast ceiling installation
• UL and cUL listed; 5-year warranty

Compatibility

Designed for use within the Wattstopper low-voltage commercial lighting control ecosystem. Requires a compatible 24VDC power pack for operation. No specific compatible model numbers were provided in the product data.

Installation Notes

Installation should be performed by a licensed electrician in accordance with the NEC and applicable local codes. De-energize the circuit and verify zero voltage at the mounting location before handling any wiring or mounting hardware. The sensor requires a separate compatible power pack — confirm power pack compatibility before installation. Avoid mounting directly over HVAC supply diffusers or in locations with excessive air movement, as drafts can interfere with PIR detection accuracy.

Technical Specifications

• Operating Voltage: 24VDC
• Coverage Area: 1200 sq ft
• Detection Type: Passive Infrared (PIR)
• Coverage Angle: 360 degrees
• Application Sector: Commercial
• Installation Location: Ceiling
• Color: White
• Material: ABS
• Product Height: 4.5 inches
• Product Width: 4.5 inches
• Product Depth: 1.6 inches
• Product Weight: 0.2 pounds
• Included Accessories: Spring Clips
• Certifications: UL, cUL
• Warranty: 5-Year
• Country of Origin: China

Standard Information

• Brand: LEGRAND
• Manufacturer Part Number: ci-305