Honeywell FS20X Dual IR & UV Flame Detector


Honeywell FS20X Dual IR & UV Flame Detector


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    Honeywell FS20X Dual IR & UV Flame Detector

    Advanced Multi Spectrum (UV/Dual IR/VIS) Flame Detector.

    Based on the foundation of the highly successful and reliable SS4 detector, the FS20X detector represents a quantum leap in integrating Infrared and Ultraviolet sensing technologies. The FS20X detector is a Multi-Spectrum and UV/Dual IR/VIS and flame detector with a proven UV solar-blind sensor. FS20X delivers a faster response and fewer false alarms, performs in a wider ambient temperature range, with a much longer detection range compared to conventional UV/IR detectors.

    Conventional and older technology UV/IR detectors, using narrow band 4.3 micron IR sensors, will not always respond to smoky fires or if the detector lens is contaminated with oil and other substances since both UV and 4.3 micron signals are attenuated, obscured or absorbed by thick smoke or detector lens contaminations. All UV sensors will be attenuated to some degree.

    Superior Technology Dual microprocessors enable fast and reliable performance. The master microprocessor performs high-speed digital sampling and signal processing calculations while the slave microprocessor handles sensor data, performs communications, self-diagnostics and manages interfaces and memory for storing event log and FirePicTM data. The FS20X detector has a detection range in excess of 60 m (200 feet) (very high sensitivity setting) for the detection of a 0.1m2 (one square-foot) Heptane reference fire and has a field of view with a greater volumetric coverage than most UV/IR detectors. This means fewer detectors can be used to cover an area as compared to other manufacturers’ detectors.

    The FS20X detector using advanced algorithms for signal processing and fire and flame analysis to alarm to most fires in all industrial environmental conditions. If the detector’s UV signal is degraded due to heavy smoke or a contaminated lens, FS20X’s patented WideBand IRTM, Near Band IR and Visible sensors will still alarm to fire, albeit at a reduced sensitivity and slower response time.


    • Detects hydrocarbon and non-hydrocarbon fuel fires in all environmental conditions.
    • Wide operating temperature range.
    • Arc welding immunity.
    • False alarm rejection.
    • Minimal maintenance for trouble-free operation.
    • PC software and interface module (FSIM) for fault diagnostics real-time graphs (RTGs), and downloading of FirePicsTM and event log.
    • Suitable for a wide variety of applications.


    • Patented Wide Band IR TM Infrared combined with Ultraviolet.
    • Detection range greater than 60 m (200 feet) to 0.1 m2 (1 sq. ft.) heptane fire.
    • Patented Electronic Frequency Analysis.
    • Visible sensor for optimum false alarm rejection.
    • Selectable detection sensitivities.
    • Solarblind 90° field of view.
    • Dual microprocessors for reliable performance.
    • Real-time clock for accurate time dating of events.
    • FirePicTM—Up to 6pre-fire event data storage.
    • Event log—Up to 200 events with date and time stamp.
    • Built-in RS-485 ModBus communication.
    • Built-in non-isolated 4-20mA analog output (sink or source).
    • Alarm, Fault and Fire Verification relays.
    • Automatic Optical Path and Electronic self-test.
    • Patented Electronics Module for component protection with plug-in terminations for easy field installation.
    • Two M25 conduit entries.
    • Low power consumption.
    • High RF Iand EMI immunity.
    • FM hazardous area approved.
    • ExdATEX/IECEx approved.
    • CU-TR approved.
    • INMETRO approved.
    • Meets SIL2 requirements.
    • Certified to EN54-10:2002.
    • FM 3260 performance.


    • Field Of View : 90° Horizontal Cone of vision, ± 45° from on axis
    • Sensitivity : Very high (60m), high (45m), medium (30m) and low (15m) - switch selectable
    • Response Time
      • 3-5 Seconds to 0.1 m2 (1 sq. ft.) n-Heptane fire at 30 m (100 ft.)
      • 3-10 Seconds to 0.1 m2 (1 sq. ft.) n-Heptane fire at 60 m (200 ft.)
    • Spectral Sensitivity
      • Ultraviolet : 185 - 260 nanometres
      • Visible : 400 – 700 nanometres
      • Near Band IR : 0.7 – 1.1 microns
      • Wide Band IR : 1.1 – 3.5 microns
    • Power Consumption :
      • Operating : 85 mA @ 24 Vdc nominal
      • Alarm : 135 mA @ 24 Vdc nominal
      • Heater : 155 mA – additional
      • Note : Heater will turn on at -17°C (0°F)
    • Operating Voltage : 24 Vdc nominal (18-32 Vdc) - regulated
    • Output Relays :
      • Fire Alarm : SPDT (NO / NC) – De-energised/energized, latching/non-latching
      • Fault : SPST (NO) – De-energised, latching/non-latching
      • Auxiliary : SPDT (NO / NC) – De-energised/energised, latching/non-latching
      • Contacts rating : 1 amp @ 24 Vdc
    • Analog Output : 0 - 20 mA stepped - source or sink user selectable
    • Loop Resistance : 50 - 400 Ohms
    • Communication
      • RS-485, ModBus Protocol
      • RS-485, FireBus II
    • Visual Indicators : Green LED: Power; Red LED: Alarm; Yellow LED: Fault
    • Tempetarure Range
      • Operating : -40 to +85°C (-40 to +185°F)
      • Storage : -55 to +110°C (-67 to +230°F)
    • Humidity Range : 5 to 98% relative humidity, non-condensing
    • Vibration : Meets or exceeds MilSpec 810C Method 514.2, Curve AW12
    • Wiring : 2.5 mm2 (14 AWG) to 0.326 mm2 (22 AWG); shielded cable recommended
    • Conduit Entries : Two M25 conduit entries
    • Enclosure Materials : Copper-free powder coated aluminum or 316 stainless steel
    • Enclosure Type : 4X, IP66 and NEMA 4
    • Shipping Weight : Aluminum: 1.6 kg (3.6 lbs) ; Stainless Steel: 3.2 kg (7 lbs)
    • Mounting : Swivel bracket assembly - optional


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