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Specifications Manual
  • Overview
  • Features
  • Applications
  • Features Detail
  • Specifications
  • Product Codes
  • Manufacturer
  • The Honeywell FS20X is the latest generation high technology MultiSpectrum (UV/Dual IR/VIS) Fire and Flame Detector, which is part of the FSX family of advanced technology Electro-Optical Flame detectors. The FS20X is the industries most advanced UV/Dual IR/VIS fire and flame detector. The FS20X utilizes a proven UV solar-blind sensor and patented technologies to virtually eliminate false alarms and exhibits faster response to fires over a wider temperature range and 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 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. Also, these old technology UV/IR detectors will not alarm to any fire if they are installed behind ordinary window glass.

    The FS20X detector uses advanced patented algorithms for signal processing and fire and flame analysis is designed to alarm to all types of fires in all industrial environmental conditions, including invisible hydrogen and silane fire. If the detector’s UV signal is degraded due to heavy smoke or a contaminated lens, the FS20X’s patented WideBand IR™, Near Band IR and Visible sensors will still be able to provide an effective alarm response time.

    Dual microprocessors provide a high level of fail-safe operation combined with fast and reliable performance. The primary microprocessor performs high-speed digital sampling and signal processing calculations; while the secondary microprocessor handles various sensor data, performs communications, self-diagnostics and provides interface versatility; and additional memory for storing Event Log and FirePic™ data that can be analyzed within our proprietary software, included with every detector.

    The FS20X detector has a detection range in excess of 200 feet (very high sensitivity setting) for the detection of a one square-foot Heptane reference fire and has a cone of vision greater in volumetric coverage than most UV/IR detectors. This means fewer detectors can be utilized to monitor more area within your installation.

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  • • Optimal false alarm rejection for all environmental conditions including Arc Welding and Solar Flares
    • Field selectable sensitivity, time delay, and outputs - complete flexibility to optimize installation
    • Analog and Relay Outputs are standard on all models
    • Simple electronics module replacement, Test lamp available for manual testing
    • Detects hydrocarbon and non-hydrocarbon fuel fires in all environmental conditions
    • PC software and Interface Module (FSIM) for fault diagnostics real-time graphs (RTGs), and downloading of FirePics™ and event log
    • Suitable for a wide variety of applications
    • Refineries and Oil Production Facilities
    • Off-Shore Platforms
    • Turbine/Compressor Enclosures
    • Acetylene Processing and Storage
    • Oil & Gas Pipelines and Pumping Stations
    • LNG/LPG Loading & Unloading Facilities
    • Natural Gas and CNG Plants
    • Ethanol, Methanol, and IPA Production and Storage
    • Crude Oil and Gasoline Storage and Tank Farms
    • Aircraft Hangars
    • Hydrogen Plants and Storage
    • Paint & Solvent Storage
    • Chemical Production, Storage, and Loading Facilities
    • Power Plants
    • Silane Gas Storage
  • • Patented* WideBand IR™ Technology
    • Patented* Electronic Frequency Analysis™
    • Visible Sensor for optimum false alarm rejection
    • Selectable detection sensitivities
    • Field-of-View: 110° full 100% cone-of-vision (90° full 100% cone-of-vision model also available)
    • Dual microprocessors for reliable performance
    • Real-time clock for accurate time dating of events
    • FirePic™ — pre-fire event data storage
    • Event log with date and time stamp
    • RS-485 ModBus communication
    • Non-Isolated 4-20 mA Analog output (sink or source)
    • Alarm, Fault and Fire Verification relays
    • Automatic optical path and electronic self-test
    • Widest operating temperature range
    • Patented* Electronics Module for components protection with easy plug-in terminations and field installation
    • Two ¾” NPT OR 25mm conduit entries
    • Low power consumption
    • High RFI and EMI immunity
    • FM, ATEX, CE mark approvals
    • Meets SIL 2 requirements

  • Field of View 90° : Full 100% Cone of vision, ± 45° from on axis

    Sensitivity : Very High, High, Medium and Low – Switch Selectable

    Response Time : 3-5 Seconds to 1 sq. ft. n-Heptane fire at 100 ft.; 3-10 Seconds to 1 sq. ft. n-Heptane fire at 200 ft.

    Spectral Sensitivity : Ultraviolet: 185 – 260 nanometers; Visible: 400 – 700 nanometers; Near Band IR: 0.7 – 1.1 microns; Wide Band IR: 1.1 – 3.5 microns

    Operating Voltage : 24 VDC nominal (18-32 VDC) – Regulated

    Power Consumption : Operating 83 mA @ 24 VDC nominal; Alarm 133 mA @ 24 VDC nominal; Heater 155 mA – additional, Note: Heater will turn on at 0ºF (-17ºC)

    Output Relays : Fire Alarm SPDT (NO / NC) – De-Energized/Energized, Latching/Non-Latching; Fault SPST (NO) – Normally Energized, Latching/Non-Latching; Auxiliary SPDT (NO / NC) – De-Energized/Energized, 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 : One of the following – User Selectable — RS-485, ModBus Protocol; RS-485, FireBus II; RS-485 Special (optional); HART, Optional plug-in module

    Visual Indications : Blue LED Power; Red LED Alarm; Yellow LED Fault

    Temperature Range : Operating -40 to +185ºF (-40 to +85ºC); Storage -67 to +230ºF (-55 to +110ºC)

    Humidity Range : 5 to 98% relative humidity, non-condensing

    Vibration : Meets or exceeds MilSpec 810C Method 514.2, Curve AW12

    Wiring : 14 AWG (2.5mm2) to 22 AWG (0.326mm2); Shielded Cable Recommended

    Conduit Entries : Standard Two ¾” NPT or two M25

    Enclosure Materials : Copper-Free Powder Coated Aluminum or 316 Stainless Steel

    Enclosure Type : NEMA 4 & 4X, IP66

    Certifications : FM: Class I, Div. 1 & 2, Groups B, C, & D; Class II, Div. 1 & 2, Groups E, F, & G; Class III — ATEX: II 2 G D; Ex d IIC T4 (Ta: -40 to +110ºC), T5 (Ta: -40 to +75ºC), T6 (Ta: -40 to +60ºC) — CE: Complies with EN6100-6-4 & EN50130-4

    Shipping Weight : Aluminum: 3.6 lbs (1.6 kg); Stainless Steel: 7 lbs (3.2 kg)

    Mounting : Swivel Bracket Assembly – Optional

    Warranty : Three years from date of shipping

  • Honeywell Analytics - FS20X-211 Series, Standard Temp Range -40° to 85°C
    DescriptionPart Number
    Dual IR/UV copper-free aluminum encl. with (2) 3/4 in. NPT entries, FM, cFM for Class I, Div. 1, Groups A, B, C, D; Class II, Div. 1, Groups E, F, G; Class IIIFS20X-211-21-2
    Dual IR/UV stainless steel encl. with (2) 3/4 in. NPT entries, FM, cFM for Class I, Div. 1, Groups A, B, C, D; Class II, Div. 1, Groups E, F, G; Class IIIFS20X-211-22-2
    Dual IR/UV copper-free aluminum encl. with (2) M25 entries, FM, cFM, ATEX, IECEx for Class I, Zone 1 FS20X-211-23-3
    Dual IR/UV stainless steel encl. with (2) M25 entries, FM, cFM, ATEX, IECEx for Class I, Zone 1 FS20X-211-24-3
    Honeywell Analytics - Spare parts FS20X
    DescriptionPart Number
    Replacement electronics module for FS20X detectors. Module only, standard temp. range FS20X-211-10
    911 Series standard temp range FS24X-911-10
    Honeywell Analytics - Accessories FS20X
     DescriptionPart Number
    Optional HART module for FS18X, FS19X, FS20X, FS24X (factory installed) FSX-A014
    Stainless steel swivel mounting assembly for FS24X, FS18X, SS4, SS2 detectors SM4
    Universal charger for Fire Sentry test lamps and interface kits. For 110-240 Vac with international plugs PSU-12
    IR test lamp for testing FS18X, FS20X and FS24X detectors, explosion proof version. Incl universal charger TL-2055
    IR test lamp for testing FS18X, FS20X and FS24X detectors, non-explosion proof version. Incl universal charger TL-1055
    Sunshield for SS2, SS4 and FS24X detectors, 316 stainless steel SH-001
    Field of view restrictor FVR-01
  • Honeywell Analytics

    For nearly 50 years, Honeywell Analytics has been protecting people who put their lives on the line every day. It takes a special level of drive and dedication to work in hostile environments, and we believe your workers deserve the same kind of commitment from us when it comes to securing their health and safety. Right from the start, our founders were determined to find better ways to design, build and manufacture reliable gas detection solutions. Through advanced technology and pure industry know-how, Honeywell Analytics continues to improve and evolve our products. Today, we’re proud to partner with customers worldwide who share our vision of vigilance and rely on us to help them protect what matters most. From custom-designed solutions to unmatched training and support, Honeywell Analytics is simply the smartest choice when you demand the best in safety.

    Electro optical detector for faster false-alarm free response to hydrocarbon fire and non-hydrocarbon fire – Honeywell Analytics