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Ceiling Mount Passive Infrared Occupancy & Daylight Sensor, Cresnet®


Provides an occupancy or vacancy sensor with built-in closed-loop photosensor for Crestron® systems. Enables customizable automation of lighting, HVAC, and other systems based on room occupancy, vacancy, and ambient light level. Enables room usage monitoring for Crestron Fusion®. Reduces wasteful energy consumption and enhances system functionality. Miniaturized flush ceiling mount design affords a nearly hidden appearance and quick installation.

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Key Features

  • Flush ceiling mount occupancy or vacancy sensor
  • Passive infrared (PIR) motion detection
  • Fully digital circuitry, highly accurate and reliable performance
  • 450 square feet (42 m2) rectangular detection pattern
  • Vacancy-only mode with grace occupancy
  • Adjustable sensitivity and timeout
  • Short timeout “walk-through” mode
  • Built-in closed-loop photosensor for daylight harvesting
  • Monitors ambient light level from natural and artificial light sources
  • Enables automation of lighting, shading, HVAC, and AV equipment
  • Reduces wasteful energy consumption
  • Maintains consistent lighting levels
  • Reports room usage to Crestron Fusion®
  • Miniaturized construction for a nearly hidden appearance
  • Installs quickly in a one-inch (25 mm) diameter hole
  • IP64 dust-proof and splash-proof
  • Cresnet® wired control system interface
  • 24 Volts DC powered via Cresnet
  • Color-coded flying lead connections
  • Easy setup via software or IR remote (sold separately)

Product Overview

Crestron® occupancy sensors and daylight sensors offer a powerful, cost-saving solution for reducing energy consumption and enhancing system functionality. As part of a complete Crestron system, they can be used to enable automation of lighting, shading, HVAC, and AV equipment in a conference room, classroom, office, hallway, or other space. Using Crestron sensors, room lighting can automatically turn on when the room is occupied, turn off when it is vacant, and dim to a lower level when there is sufficient natural daylight from windows and skylights. Sensors can also be used to enhance the capabilities of a room scheduling, asset management, or energy monitoring solution through integration with the Crestron Fusion® Enterprise Management service.

The GLS-OIRLCL-C-CN serves dual functions as a passive infrared occupancy sensor and closed-loop photocell daylight sensor (photosensor). It can also operate in vacancy-only mode, and is designed to cover an area up to 450 square feet or 42 square meters. Miniaturized construction affords a nearly hidden appearance when installed in a drywall or drop-tile ceiling. It communicates with a Crestron control system via the Cresnet® network. Setup and configuration is accomplished using Crestron Toolbox software or the optional IR remote (model GLS-REMOTE-ODT/OIR, sold separately).

Passive Infrared Occupancy Sensing
Passive infrared (PIR) technology employs a highly sensitive specialized lens that divides the field-of-view into 64 detection zones. The sensor detects motion when a warm body passes between zones, achieving dependable motion detection with superior immunity to false triggering from vibrations, inanimate objects, or movement in an adjacent corridor. The detection sensitivity can be set to one of three levels for optimum performance. Timeout can be set to one of six settings ranging from 30 seconds to 30 minutes, preventing the sensor from turning off lights or reporting vacancy during moments when the room is occupied but no one is moving. In addition, a “walk-through” mode (Short Timeout) can be enabled to temporarily override the Timeout setting on occasions when the room is only occupied briefly for 90 seconds or less.

Vacancy Only Mode with Grace Occupancy
The GLS-OIRLCL-C-CN can be configured to sense vacancy only. In this mode, lighting and other equipment must be turned on manually but shuts off automatically after the room is vacated. The “grace occupancy” feature ensures that if the lights turn off while someone is in the room, they can be turned back on by simply waving a hand within a 15 second grace period.

Daylight Sensing
Its built-in photocell enables the GLS-OIRLCL-C-CN to function as an closed-loop photosensor as part of a complete daylight harvesting solution. By monitoring the ambient light level in the room, electrical lighting can be dimmed automatically when sufficient natural daylight is available. Daylight harvesting enables organizations to improve energy efficiency by taking advantage of natural sunlight from windows and skylights while maintaining consistent lighting levels throughout the day for a more comfortable workspace.

Room Usage Monitoring
Through integration with the Crestron Fusion Enterprise Management service, occupancy sensors can be leveraged to log room usage based on occupancy, and to maximize efficiency for room scheduling by reporting if a room is occupied or vacant. In the event no one has shown up for a scheduled meeting, the meeting can be cancelled automatically, making the room available to others.

The GLS-OIRLCL-C-CN interfaces with a Crestron control system via Cresnet. Cresnet is a simple 4-wire network bus that provides the communications backbone for a system of Crestron sensors, lighting dimmers and switches, motorized shades, thermostats, keypads, and other devices. The GLS-OIRLCL-C-CN is also powered by 24 Volts DC from the Cresnet network.

Ceiling Flush Mount Installation
The GLS-OIRLCL-C-CN installs easily in a typical drywall or drop-tile ceiling. Simply drill a one-inch (25 mm) diameter hole and insert the sensor. Integrated compression clips hold the sensor in place. Once installed, it achieves a very discreet and flush appearance against a white ceiling.

Note 1: The motion detection pattern is rectangular. The sensor should be positioned and oriented accordingly to achieve the desired performance within the space.
Note 2: Some functions described in this spec sheet may require custom commissioning of the control system by an authorized Crestron system programmer.

This product may be purchased from an authorized Crestron dealer. To find a dealer, please contact the Crestron sales representative for your area. A list of sales representatives is available online at or by calling 800-237-2041.

The specific patents that cover Crestron products are listed online at:

Certain Crestron products contain open source software. For specific information, please visit

Crestron, the Crestron logo, Cresnet, and Crestron Fusion are either trademarks or registered trademarks of Crestron Electronics, Inc. in the United States and/or other countries. Other trademarks, registered trademarks, and trade names may be used in this document to refer to either the entities claiming the marks and names or their products. Crestron disclaims any proprietary interest in the marks and names of others. Crestron is not responsible for errors in typography or photography. Specifications are subject to change without notice. ©2017 Crestron Electronics, Inc.

Product Specs

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