The company that revolutionized very early warning smoke detection with VESDA has reinvented smoke detection for open spaces with Open-area Smoke Imaging Detection (OSID). 

Large, open spaces – warehouses, airports, train stations, stadiums and shopping malls – pose unique challenges to reliable fire detection due to their environmental nature and limitations.

Open-area Smoke Imaging Detection

OSID is designed specifically for these environments, enabling early detection and response to save lives and prevent service disruptions.

OSID uses a sophisticated algorithm to map and compare the strength of infrared (IR) and ultraviolet (UV) light signals from detectors configured in the area.

OSID also reduces the costs of installation thanks the ball and socket arrangement with simple laser screwdriver alignment. The Emitters come both battery powered and wired.

Superior Features

• Patented dual wavelength, UV & IR, particle detection

• CMOS imager with wide viewing angles

• Simple installation, commissioning and maintenance – up to 70% time saving compared to traditional beams

• High tolerance to vibration and structural movement and high airflow

• High resistance to dust, fogging, steam, reflections and object intrusion

• High resistance to reflected sunlight

• Requires as little as 20 x 20 cm (8×8“) unobstructed width of view

• On-board log memory for fault and alarm diagnostics

• Software tool for diagnostic purposes

• Aesthetically discreet and 3D coverage

• Long range up to 150 m (492 ft)


Shopping Malls ― 3-D arrangement may be configured to protect many large, open spaces

Long Corridors ― Beam length up to 150 m (492 ft)

Airport Terminals and Train Stations, Indoor Stadiums and Arenas ― Nonintrusive detection in a wide range of lighting conditions, Multi-layer detection

Heritage Buildings, Churches and Cathedrals― Discreet and nonintrusive detection

Suspended Ceilings ― Discreet and flexible installation

Multi-layer detection ― Simple maintenance with no disruption to operations

Dirty Environments ― Discriminates against dust, dirt and other objects

Hotel and Office, Exhibition and Convention Centers

Industrial and Manufacturing Facilities

5 Reason for using OSID

1. OSID Configurations

OSID systems may be configured to protect a range of spaces, regardless of shape. The protection zone or “fire web” is determined by the placement of OSID detectors. Multi-emitter solutions provide a true 3D arrangement.

2. Where Flexible Detection Coverage is Needed

OSID can support up to 7 Emitters with a single Imager making it easy to deploy in unusually shaped areas. Emitters can be placed at different heights to overcome stratification and provide earlier detection. This Multi-Emitter 3D approach also provides a 50% better detection coverage because beams converging to one point are more closely spaced in the area.

3. Unique Detection Technology

OSID innovatively combines two technologies to reliably detect smoke in large, open spaces. 

Dual-wavelength Particle Detection 

By using two wavelengths of light to detect particles, the system is able to distinguish between particle sizes. The shorter UV wavelength interacts strongly with both small and large particles, while the longer IR wavelength is affected predominantly by larger particles. Dual-wavelength path loss measurements therefore enable the detector to provide repeatable smoke obscuration values, while rejecting the presence of dust particles or solid intruding objects.

4. Optical Imaging with CMOS Imager Arrays

An optical imaging array in the OSID detector provides a wider viewing angle to locate and capture images. Consequently, the system is easier to install and align and can compensate for drift caused by natural shifts in building structures.

Optical filtering, high-speed image acquisition, and intelligent software algorithms also enable the OSID detector to process images and provide new levels of stability and sensitivity while providing high tolerance to high-level lighting variability.

5. OSID Diagnostic Software

OSID Diagnostic is a unique tool in the industry that allows for live and off-line diagnostic information about the system and environment.

The tool operates under Windows on a standard laptop PC and offers, when connected in the field to the Imager, real time live visualization of the normalized UV and IR values (0-100% obscuration), the UV and IR grey levels, the X-Y positioning of the 1-7 Emitters on the imager, reference levels and temperature.