Xtralis OSID Open-area Smoke Imaging Detector


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    OSID Open-area Smoke Imaging Detector - OSI-10 Imager 8° FOV

    Open-area Smoke Imaging Detection (OSID) is a new innovation in projected beam smoke detection technology. By using advanced dual wavelength projected beams and optical imaging technology for early warning smoke detection, OSID provides a low-cost, reliable and easy-to-install solution that overcomes typical beam detection issues such as false alarm incidents and alignment difficulties.

    Unique Detection Technology

    The OSID system measures the level of smoke entering beams of light projected over an area of protection. A single OSID Imager can detect up to seven Emitters to provide a wide coverage area. Two innovations in smoke detection technology have been developed for the revolutionary OSID smoke detector:

    Dual Wavelength Particle Detection

    The beam projected from each Emitter contains a unique sequence of ultraviolet (UV) and infrared (IR) pulses that are synchronised with the Imager and enable the rejection of any unwanted light sources. 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 only by larger particles. Dual wavelength path loss measurements enable the detector to provide repeatable smoke obscuration measurements, while rejecting the presence of dust particles or solid intruding objects.

    Optical Imaging with a CMOS Imaging Chip

    An optical imaging array in the OSID Imager provides the detector with a wide viewing angle to locate and track multiple Emitters. Consequently, the system can tolerate a much less precise installation and can compensate for the drift caused by natural shifts in building structures. Optical filtering, high-speed image acquisition and intelligent software algorithms also enable the OSID system to provide new levels of stability and sensitivity with greater immunity to high level lighting variability.


    OSID’s uncompromising performance is based on the patented use of digital imaging, dual-frequency beams and smart algorithms delivering:

    • No need for precise alignment
    • Tolerant of alignment drift
    • Automatic commisioning in under ten minutes
    • Simple DIP switch configuration
    • Dual wavelength LED-based smoke detection
    • Simple and easy maintenance requirements
    • Conventional alarm interface for straightforward fire system integration
    • Three selectable alarm thresholds


    OSID is ideal for use in a wide range of industries and applications. These include atriums, domes and large rooms in:

      • Airports
      • Train stations
      • Shopping centres
      • Stadiums
      • Educational facilities
      • Hotels, convention centres and office buildings/complexes
      • Entertainment venues
      • Warehouses and production floors


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