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SKU# (2986)

HONEYWELL  FS20X-211-212

$2,861.54     Availability: In Stock
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Honeywell Fire Sentry FS20X Multi-Spectrum (UV/Dual IR/VIS) Fire and Flame Detector for hydrocarbon and non-hydrocarbonfuel fires in all industrial enviromental conditions. 90° field of view. RS-485 MODBUS communication and 0-20 mA stepped analog output. Includes fire, fault and auxiliary relays. NEMA 4 & 4X enclosure. IP66. FM, ATEX and CE approvals.

Part# with Options:        FS20X-211-212
Price with Options:        2,861.54


(1) Model for Honeywell FS20X
Mounting Assembly
(2) Mounting Assembly for Honeywell FS24X/FS18X/SS4/SS2
(3) Sunshield for Honeywell SS2/SS4/FS24X
Field of View Restrictor
(4) Field of View Restrictor for Honeywell FS24X/SS4
FSX Interface Kit
(5) FSX Interface Kit for Honeywell FS24X
FSX Interface Module
(6) FSX Interface Module for Honeywell FS24X
HART Option
(7) HART Option for Honeywell FS20X
For INMETRO version

  Availability In Stock  ]

Standard configurations typically available in In Stock:
FS20X-211-212    FS20X-211-212-SM4

The Fire Sentry FS20X is the latest generation high technology Multi- Spectrum (UV/Dual IR/VIS) Fire and Flame Detector, which is part of the FSX family of advanced technology Electro-Optical Flame detectors.

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


  • Patented* WideBand IRTM Infrared combined with Ultraviolet
  • Detection range greater than 200 feet to 1 sq. ft. heptane fire
  • Patented* Electronic Frequency Analysis
  • Visible Sensor for optimum false alarm rejection
  • Selectable detection sensitivities
  • Solar blind 90° full 100% cone-of-vision
  • Dual Microprocessors for reliable performance
  • Real-time clock for accurate time dating of events
  • FirePicTM — Up to 6 pre-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 4-20 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 plug-in terminations for easy field installation
  • Two 3⁄4” NPT OR 25mm conduit entries
  • Low power consumption
  • High RFI and EMI immunity
  • FM approved

  • Detects hydrocarbon and non-hydrocarbon fuel fires in all environmental conditions
  • Arc welding immunity
  • False alarm rejection for all environmental conditions
  • 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

  • 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

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 Fire Sentry 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. If the detector’s UV signal is degraded due to heavy smoke or a contaminated lens, the Fire Sentry FS20X’s patented* WideBand IRTM, Near Band IR and Visible sensors will still alarm to fire but at a reduced sensitivity and slower response time.

Dual microprocessors provide a high level of fail-safe operation combined with fast and reliable performance. The Master Microprocessor performs high-speed digital sampling and signal processing calculations; while the slave microprocessor handles various sensor data, performs communications, self-diagnostics and provides interface versatility; and additional memory for storing Event Log and FirePicTM data.

The Fire Sentry 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 used as compared to other manufacturers’ detectors.

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 3⁄4” 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: -60 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
Export Info
Harmonized Tariff Code (HTC)8536509065

    FSX-A014 Honeywell Optional HART module for FS20X detectors (factory installed) ..

    DASA1-P Honeywell DASA1-P Air Shield for Honeywell Fire Sentry FS24X, FS20X, FS10, SS4 and SS2 Flame Detectors. Accepts 1/4" O.D. nylon tubing. ..

    FSX-A001 Honeywell FSX-A001 Interface for Fire Sentry FS24X and FS20X Flame Detectors. Converts RS-485 to USB and includes a USB driver. *** Phased Out *** ..

    FVR-01 Honeywell FVR-01 Field of View Restrictor for Honeywell Fire Sentry FS24X, FS20X, SS4, SS2, and FS10 Flame Detectors. PVC construction with steel circle clamp. ..

    TL-1055 IR test lamp for testing FSX detectors, non-explosion proof version. Incl universal charger ..

    SH-001 Honeywell Fire Sentry SS4 Sunshield for SS2, SS4, FS20X & FS24X Detectors, 316 Stainless Steel ..

    SM4 Honeywell Fire Sentry SS4 Swivel mount For Fire Sentry FS24X, FS20X, FS10, SS4 and SS2 Flame Detectors ..

    TL-2055 HONEYWELL Class I, Div. 1 approved explosion-proof test lamp (flame simulator) for testing Fire Sentry FSX, FS24X (IR3) and FS20X (UV, IR and IR/UV) Flame Detectors externally in a hazardous location. Flame detectors that detect at 185-235 nm UV, near IR, ..

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> ULTRAVIOLET/INFRARED :    6 Items found.

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