WattStopper LMLS-400 Closed Loop Photo Sensor

Description:

The WattStopper LMLS-400 Closed Loop Photosensor is a digital lighting management sensor designed to measure ambient light levels and automatically switch or dim a single lighting zone based on available daylight. As part of the WattStopper Digital Lighting Management (DLM) system, the LMLS-400 provides closed-loop daylight harvesting control by continuously monitoring light levels and communicating with compatible room controllers. The sensor features photopic correction to mimic the human eye and an extended sensing range, making it ideal for energy-efficient lighting control in commercial and institutional facilities.

Applications:

The WattStopper LMLS-400 Closed Loop Photosensor is commonly used in office buildings, educational facilities, healthcare institutions, conference rooms, retail spaces, commercial buildings, government facilities, and energy management systems where automatic daylight harvesting, lighting control, energy savings, occupancy-based lighting strategies, and single-zone dimming or switching control are required to maintain consistent illumination levels while reducing energy consumption.

Technical Specifications:

• Manufacturer: WattStopper / Legrand
• Model: LMLS-400
• Product Type: Closed Loop Digital Photosensor
• Control Zones: 1 Zone
• Function: Automatic daylight-responsive switching and dimming
• System Compatibility: Digital Lighting Management (DLM) Systems
• Input Voltage: 24 VDC
• Sensor Type: Photodiode with Photopic Correction
• Sensing Range: 1–1,553 Footcandles (fc)
• Spatial Response: 100°
• Control Modes: On/Off, Bi-Level, Tri-Level, and Dimming
• Communication: DLM Local Network
• Connection Type: RJ-45
• Mounting Type: Ceiling Mounted
• Material: ABS Plastic
• Color: White
• Operating Temperature: 32°F to 131°F (0°C to 55°C)
• Application Type: Daylight Harvesting and Lighting Control
• Equipment Category: Lighting Control Sensor

Common Replacements:

• WattStopper LMLS-500 Open Loop Photosensor
• Acuity Brands nLight NPS Series Photosensor
• Leviton GreenMAX Daylight Sensor