SensorWorx SWX-121-D-BK Wall Switch Sensor Dual Tech Partial Auto-On 120–277V 0–10V Dimming Black

Product Overview

The SensorWorx SWX-121-D-BK is a line-voltage wall switch occupancy sensor designed for automatic lighting control in commercial environments. Operating on 120–277V, it uses dual-technology sensing (PIR + acoustic) to detect occupancy and control connected lighting loads. The unit features Partial Auto-On operation (auto-on to 50%) and supports 0–10V dimming for compatible lighting systems, helping improve energy efficiency while maintaining user control.

Key Features & Design

• Functionality: Dual-technology occupancy sensor (PIR + acoustic) providing partial auto-ON (50%) and automatic OFF control, with integrated 0–10V dimming capability
• Installation context: Wallbox-mounted device designed for line-voltage commercial lighting systems, suitable for retrofit or new installations
• Notable specifications: 120–277V AC operation; dual-technology sensing (PIR + acoustic); wall-to-wall (~180°) coverage; partial auto-ON (50%); 0–10V dimming compatibility; single-gang wallbox mounting
• Contractor-relevant details: Interchangeable line/load wiring simplifies installation; supports both neutral and no-neutral configurations; shallow design (<1” depth) fits crowded wallboxes; supports 0–10V dimmable lighting loads

Performance / Benefits

In real-world applications, the SWX-121-D-BK provides reliable occupancy-based lighting control while reducing energy consumption. Dual-technology sensing improves detection accuracy in spaces with limited motion or obstructions, while partial auto-on operation supports energy code requirements. Integrated 0–10V dimming enables flexible light level adjustment for improved comfort and efficiency, making it well-suited for offices, conference rooms, corridors, and other commercial spaces.