Orbis Intrinsically Safe (IS) Optical Smoke Detector with Optional Flashing LED


Orbis Intrinsically Safe (IS) Optical Smoke Detector with Optional Flashing LED (ORB-OP-52027-APO)


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    Orbis Intrinsically Safe (IS) Optical Smoke Detector

    Orbis IS Optical Smoke Detectors are recommend for use as general purpose smoke detectors and are particularly suitable for smouldering fires. This optical smoke detector is equally as good in black smoke as it is in white smoke and is designed to significantly reduce the risk of false alarms through over-sensitivity to transient phenomena.

    Please note, all Orbis Intrinsically Safe Detectors require an Orbis Intrinsically Safe Base in order to be mounted.

    Key Features

    • TimeSaver base provides simple installation
    • StartUp flashing LED to confirm devices are wired in the correct polarity
    • Continuity link enables voltage testing of zone wiring before commissioning
    • Wide angle optics respond well to a wide range of fires
    • DustDefy system prevents dust ingress while maintaining airflow
    • Transient rejection uses algorithms to reduce false alarms
    • Drift compensation maintains calibrated sensitivity levels even if the detector is contaminated
    • DirtAlert shows the drift compensation limit has been reached
    • Sensalert indicates incorrect detector operation
    • FasTest maintenance procedure takes just 4 seconds to complete
    • E-Z fit slots allow base to be fixed in position without removing mounting screws
    • 360° visibility of LEDs


    The Orbis IS Optical Smoke Detector is suitable for use on marine and offshore applications as well as land-based systems and has been tested and approved to the following standards

    European Standard EN54 Fire Detection and Fire Alarm Systems:

    • EN54-7: 2000

    Electromagnetic Compatibility:

    • EN61000-6-3
    • EN50130-4

    ATEX-Related Standards:

    • BSEN60079-0:2004
    • IEC60079-0:2004
    • EN50020:2002
    • EN/BSEN/IEC60079-26:2004

    Marine Type Approval Standards:

    • American Bureau of Shipping (ABS)
    • Bureau Veritas (BV)
    • Det Norske Veritas (DNV)
    • Germanischer Lloyd (GL)
    • Lloyds Register (LR)

    Technical Specification

    • Sampling Frequency: Once every 4 seconds
    • Supply Voltage: 14-28V DC
    • Supply Wiring: 2 wires, polarity sensitive
    • Polarity Reversal: Not allowed
    • Power-up time: < 20 seconds
    • Minimum 'Detector Active' Voltage: 12V
    • Switch-on Surge Current at 24V: 105uA
    • Average Quiescent Current at 24V: 85uA
    • Alarm Load: 325 Ohms in series with a 1.0V drop
    • Minimum Holding Voltage: 5V
    • Minimum Voltage to Light Alarm LED: 6V
    • Alarm Reset Voltage: <1V
    • Alarm Reset Time: 1 Second
    • Remote Output LED (-) Characteristic: 4.7kOhms connected to negative supply
    • Material: White Polycarbonate
    • Alarm indicator: Integral indicator with 360° visibility
    • Dimensions (D x H mm): 100 x 42 mm
    • Weight: 75g
    • Operating and Storage Temperature: -40°C to +70°C
      • Operating temperature is restricted by the intrinsic safety gas
      • classification:
      • Class T5: -40°C to +40°C
      • Class T4: -40°C to +60°C
      • The detector must be protected from conditions of condensation or icing
    • Humidity: 0% to 98% relative humidity (no condensation)
    • Wind Speed: Unaffected by wind
    • Atmospheric Pressure: Insensitive to pressure
    • IP Rating to EN 6052:1992: 23D
    • Electromagnetic Compatibility:
    • Emissions: BS EN61000-6-3
    • Susceptibility: BS EN50130-4


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