Dual Tech Occupancy Sensor 100-347VAC, Center Mount 360° - Occupancy Sensor

The Wattstopper DT-355 is a low profile dual technology occupancy sensor designed for ceiling mounting, providing 360-degree coverage. Combining passive infrared (PIR) and ultrasonic sensing technologies, it accurately detects occupancy to control lighting systems in commercial and institutional environments. Ideal for classrooms, open office areas, and large spaces, this sensor operates on line voltage (100-347VAC) without requiring a power pack, making it suitable for electrical distributors and lighting solutions providers. The sensor’s advanced logic minimizes false triggers and supports multiple operating modes, including walk-through and light level sensing for energy savings.

Specifications

• Voltage: 120/230/277/347 VAC, 50/60 Hz
• Load Rating: 0-800W Ballast/Tungsten/LED at 120VAC; 0-1200W Ballast/LED at 230VAC and 277VAC; 0-1500W Ballast/LED at 347VAC
• Operating Temperature: 32° to 131°F (0° to 55°C)
• Coverage: 360° with typical PIR and Ultrasonic coverage of 1300 ft² (approx. 36 ft radius)
• Dimensions: Diameter 4.0 in, Depth 5.0 in, Height 3.0 in
• Frequency: Ultrasonic 40 kHz
• Light Level Adjustment Range: 10FC to 300FC
• Time Delay Adjustment: 30 seconds to 30 minutes
• Walk-Through Mode: Lights turn off after 3 minutes if no activity detected 30 seconds after occupancy
• Terminal Torque Rating: 4.428 inch-pound force (0.5 Nm)
• Country of Origin: China
• UL and cUL Listed
• Five Year Warranty

Features

• Dual technology sensing combining PIR and ultrasonic to reduce false triggers
• Flat, unobtrusive ceiling mount design suitable for 8-12 ft ceiling heights
• Advanced microcontroller-based logic with detection signature processing
• Walk-through mode for energy savings in transient occupancy applications
• Built-in light level sensor to prevent lighting activation when ambient light is sufficient
• DIP switch configurable settings for time delay, sensitivity, occupancy logic, and walk-through mode
• Ultrasonic diffusion technology for wider coverage area
• Compatibility with standard 4” square or octagonal junction boxes using included mounting hardware or optional CA-1 adapter
• LED indicators for occupancy detection status
• BAA/TAA compliant model available (DT-355-U)

Downloads & Links

• DT-355 Installation Instructions
• DT-355 360¬∞ Line Voltage Dual Tech Occupancy Sensor
• Control Six Brochure
• 57-303 - CI, DT, UT-305 Standard Schematic
• Dual Technology Line Voltage Ceiling Sensor
• 57-301 - DT-355 Standard Schematic
• 57-039-9 - CI,DT,UT-300 Sensor Mounting Details
• CA-1 Cosmetic Adapter for Circular Ceiling Mount Sensors