Farenhyt FS24X Data sheet
Honeywell Analytics Fire Sentry FS20X
Multi-Spectrum UV/Dual IR/VIS Fire and
Flame Detector
Agency Listings
The Honeywell Analytics 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 reliable Fire Sentry SS4 detector, the
Fire Sentry FS20X detector integrates infrared and ultraviolet
sensing technologies. It 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 IR™ Infrared combined with Ultraviolet
• Detection range greater than 200 ft. 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
• FirePic™ — 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 and
plug-in terminations for easy field installation
• Two ¾” NPT OR 25mm conduit entries
• Low power consumption
• High RFI and EMI immunity
• FM, ATEX, CE mark approvals
• Refineries and Oil Production Facilities
• Off-Shore Platforms
• Turbine/Compressor Enclosures
• Acetylene Processing and Storage
• Oil & Gas Pipelines and Pumping Stations
• Natural Gas and CNG Plants
• Ethanol, Methanol, and IPA Production and
• Aircraft Hangars
• Hydrogen Plants and Storage
• Paint & Solvent Storage
• Chemical Storage, and Loading Facilities
• Power Plants
• Silane Gas Storage
Fire Sentry FS20X is compatible with the
following Silent Knight FACPs:
• IFP-1000ECS
• IFP-2000VIP
• IFP-1000
• IFP-100
• IFP-100ECS
• IFP-50
• IFP-2000
P/N 350406 Rev A
Copyright © 2012 Honeywell International Inc.
Field of View
Response Time
Output Relays
Analog Output
110° Full 100% Cone of vision, ± 55° from
on axis
Very High, High, Medium and Low —
Switch Selectable
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.
Ultraviolet: 185 - 260 nanometers
Visible: 400 – 700 nanometers
Near Band IR: 0.7 – 1.1 microns
Wide Band IR: 1.1 – 3.5 microns
24 VDC nominal (18-32 VDC) - Regulated
Operating: 83 mA @ 24 VDC nominal
133 mA @ 24 VDC nominal
155 mA – additional Note: Heater will turn
on at 0ºF (-17ºC)
Fire Alarm: SPDT (NO / NC) – De
Energized/Energized, Latching/NonLatching Fault: SPST (NO) – Normally
Energized, Latching/Non-Latching
Auxiliary: SPDT (NO / NC) –
DeEnergized/Energized, Latching/NonLatching
0 - 20 mA stepped - Source or Sink User
Loop resistance 50 - 400 Ohms
Blue LED: Power
Red LED: Alarm
Yellow LED: Fault
Operating: -40 to +185ºF (-40 to +85ºC)
Storage: -67 to +230ºF (-55 to +110ºC)
Humidity Range 5 to 95% relative humidity, non-condensing
Conduit Entries
Enclosure Type
Meets or exceeds MilSpec 810C Method
514.2, Curve AW12
14 AWG (2.5mm2) to 22 AWG (0.326mm2);
Shielded Cable Recommended
Standard: Two ¾” NPT or two M25
Copper-Free Powder Coated Aluminum or
316 Stainless Steel
NEMA 4 & 4X, IP66
Ordering Information
Fire Sentry FS20X Multi-Spectrum IR &
UV/Dual IR/VIS Fire and Flame Detector
Fire Sentry Test Lamp
Fire Sentry Test Lamp
Swivel Mount
Air Shield
Fire Sentry interface kit
This document is not intended to be used for installation purposes. We try to keep our product
information up-to-date and accurate. We cannot cover all specific applications or anticipate all
requirements. All specifications are subject to change without notice. For more information, contact
Silent Knight 12 Clintonville Road, Northford, CT 06472-1610 Phone: (800) 328-0103,
Fax: (203) 484-7118. www.farenhyt.com
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