Please email / call for availability
Get a quote
Enter your details and we will get back to you as soon as possible.

Product Features
  • 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
Delivery options

At Cadmus Products we aim to deliver orders efficiently and at highly competitive rates. 

  • We can ship consignments of all shapes and sizes and hazardous content across the UK and worldwide. Most of our orders are sent via DHL, however sometimes we may use other couriers.
  • If you are purchasing a laboratory product online you can find out the price of shipping checkout. If you are obtaining a quote for a product, then we will email you
    with our best shipping prices along with your quote.
  • Please see our delivery page for full information

The Honeywell Analytics Fire Sentry FS24X Flame Detector is the latest generation high technology Multi-Spectrum Triple IR (IR/IR/IR/Visible) Flame Detector, which is part of our FSX family of advanced technology Electro-Optical fire detectors. Using our patented* WideBand IR™, WideBand 4.3 micron IR™, and Visible detection technology, the FS24X is a quantum leap in flame detection. Sophisticated software algorithms and dual microprocessors ensure that the FS24X has the highest fire detection performance combined with optimal false alarm rejection.

  • The WideBand IR™ Infrared technology using high-speed solid-state Quantum sensors allows the detection of all types of fires, hydrocarbon and non-hydrocarbon, in all weather conditions. If the detector’s signal is blocked by ordinary window glass, the patented WideBand IR sensors will still alarm the 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 FirePic™ data.
      • The FSX family of detectors feature our patented* FirePic data storage and information retrieval facility. FirePic™ records pre-fire data, which can be recovered from the Detector’s non-volatile flash memory for post-fire analysis and postulation of the fire cause. Additionally, unique Real-Time Graphing (RTG™) allows viewing of the data that the Detector sees. A combination of outputs makes the FS24X a versatile detector for today’s demanding industrial requirements.
        • The Honeywell Analytics Fire Sentry FS24X Flame Detector has a detection range greater than 200 feet (Very High Sensitivity Setting) for the detection of a one square-foot Heptane reference fire and has a cone of vision far greater in volumetric coverage than any other Multi-Spectrum IR Detector. This means fewer detectors can be used as compared to other manufacturers’ detectors.

          • Features:

            • ▪ 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

                                              • Benefits:

                                                • ▪ Detects hydrocarbon and non-hydrocarbon fuel fires in all environmental conditions
                                                  • ▪ User selectable outputs
                                                    • ▪ Optimal false alarm rejection for all environmental conditions
                                                      • ▪ Minimal maintenance for trouble-free operation
                                                        • ▪ PC software and Interface Module (FSIM) for fault diagnostics, real-time graphics (RTGs), and downloading of FirePics™ and event log
                                                          • ▪ Suitable for a wide variety of applications
                                                            • ▪ Easy electronics module replacement
                                                              • ▪ Test lamps for manual testing

                                                                • Applications:

                                                                  • ▪ Refineries and oil production facilities
                                                                    • ▪ Off-shore platforms
                                                                      • ▪ Turbine/Compressor enclosures
                                                                        • ▪ Oil and gas pipelines and pumping stations
                                                                          • ▪ LNG/LPG loading and unloading facilities
                                                                            • ▪ Natural gas and CNG plants
                                                                              • ▪ Ethanol, Methanol, and IPA production and storage
                                                                                • ▪ Crude oil and gasoline storage and tank farms
                                                                                  • ▪ Aircraft hangars
                                                                                    • ▪ Paint and solvent storage
                                                                                      • ▪ Chemical production, storage, and loading facilities
                                                                                        • ▪ Power plants

    Product Specification

    General
    Field of View - FS24X-9: 90° cone of vision, ± 45° from on axis
    - FS24X-2: 110° cone of vision, ± 55° from on axis
    Sensitivity Very high (200 ft.), high (150 ft.), medium (100 ft.) and low (50 ft.) - switch selectable
    Response Time - 3-5 seconds to 1 sq. ft. n-Heptane fire at 30 m (100 ft.)
    - 3-10 seconds to (1 sq. ft. n-Heptane fire at 60 m (200 ft.)
    Spectral Sensitivity - Visible: 400 – 700 nanometres
    - Near Band IR: 0.7 – 1.1 microns
    - Wide Band IR: 1.1 – 3.0 microns
    - Wide Band IR: 3.0 – 5.0 microns
    Operating Voltage 24 Vdc nominal (18-32 Vdc) - regulated
    Power Consumption - Operating: 56 mA @ 24 Vdc nominal
    - Alarm: 106 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) – De-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
    - HART, Optional plug-in module (not available on EN54-10 units)
    Visual indications - Green LED: Power
    - Red LED: Alarm
    - Yellow LED: Fault
    Temperature range - Operating: 110° Field of View FS24X: -40ºF to +185ºF (-40ºC to +85ºC); 90° Field of View FS24X: -60°C to +85°C (-76°F to +185°F)
    - Storage: -67ºF to +230ºF (-55ºC 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 to 22 AWG; shielded cable recommended
    Conduit Entries Standard: Two M25 or two ¾" NPT
    Enclosure Materials Copper-free powder coated aluminum or 316 stainless steel
    Enclosure Type IP66 and NEMA 4 & 4X
    Certifications - FM: Class I, Div. 1 & 2, Groups B, C, & D; Class II, Div. 1 & 2, Groups E, F, & G; Class III
    - ATEX/IECEx: II 2 G Ex db IIC T4 (Ta: -60 to +110°C), T5 (Ta: -60 to +75°C), T6 (Ta: -60 to +60°C), II 2 D Ex tb IIIC T135°C (FS24X-9, 90° Field of View), II 2 G Ex db IIC T4 (Ta: -40 to +110°C), T5 (Ta: -40 to +75°C), T6 (Ta: -40 to +60°C), II 2 D Ex tb IIIC T135°C (FS24X-2, 110° Field of View
    - CE: Complies with EN6100-6-4 & EN50130-4
    - INMETRO
    - CU-TR
    - SIL Rating: FMEDA available on request
    - EN54-10: FS24X-9 certified 1175a/02 (LPCB); CPR 0832-CPR-F0516
    Shipping Weight - Aluminum: 1.6 kg (3.6 lbs)
    - Stainless Steel: 3.2 kg (7 lbs)
    Mounting Swivel bracket assembly - optional
    Warranty Three years from date of shipping
    FS24X-211 Series with 110° field of view, standard temp range -40° to 85°C
    • FS24X-211-21-1 QuadBand™ IR3+ Detector, Copper-Free Aluminum Encl., (2) ¾"NPT entries FM, cFM, IECEx & ATEX approved
    • FS24X-211-22-1 QuadBand™ IR3+ Detector, 316 Stainless Steel Encl., (2) ¾" NPT entries FM, cFM, IECEx & ATEX approved
    • FS24X-211-23-1 QuadBand™ IR3+ Detector, Copper-Free Aluminum Encl., (2) M25 entries FM, cFM, IECEx & ATEX approved
    • FS24X-211-24-1 QuadBand™ IR3+ Detector, 316 Stainless Steel Encl. (2) M25 entries FM, cFM, IECEx & ATEX approved
    • FS24X-911 Series with 90° field of view, standard temp range -60° to 85°C
    • FS24X-911-21-1 QuadBand™ IR3+ Detector, Copper-Free Aluminum Encl., (2) ¾"NPT entries FM, cFM, IECEx & ATEX approved
    • FS24X-911-22-1 QuadBand™ IR3+ Detector, 316 Stainless Steel Encl., (2) ¾" NPT entries FM, cFM, IECEx & ATEX approved
    • FS24X-911-23-1 QuadBand™ IR3+ Detector, Copper-Free Aluminum Encl., (2) M25 entries FM, cFM, IECEx & ATEX approved
    • FS24X-911-24-1 QuadBand™ IR3+ Detector, 316 Stainless Steel Encl. (2) M25 entries FM, cFM, IECEx & ATEX approved
    • FS24X-911-21-6 QuadBand™ IR3+ Detector, Copper-Free Aluminum Encl., (2) ¾"NPT entries FM, cFM, IECEx, ATEX and EN54-10 approved
    • FS24X-911-22-6 QuadBand™ IR3+ Detector, 316 Stainless Steel Encl., (2) ¾" NPT entries FM, cFM, IECEx, ATEX and EN54-10 approved
    • FS24X-911-23-6 QuadBand™ IR3+ Detector, Copper-Free Aluminum Encl., (2) M25 entries FM, cFM, IECEx, ATEX and EN54-10 approved
    • FS24X-911-24-6 QuadBand™ IR3+ Detector, 316 Stainless Steel Encl. (2) M25 entries FM, cFM, IECEx, ATEX and EN54-10 approved
    FS24X-211 Kits
    • FS24X-212-21-1 FS24X-211-21-1 QuadBand™ IR3+ Detector, Copper-Free Aluminum Encl., (2) ¾"NPT entries FM, cFM, IECEx & ATEX approved with FSX-A014R Optional Registered HART Module for FS24X Detectors Factory installed.
    • FS24X-212-22-1 FS24X-211-22-1 QuadBand™ IR3+ Detector, 316 Stainless Steel Encl., (2) ¾" NPT entries FM, cFM, IECEx & ATEX approved with FSX-A014R Optional Registered HART Module for FS24X Detectors Factory installed.
    • FS24X-212-23-1 FS24X-211-23-1 QuadBand™ IR3+ Detector, Copper-Free Aluminum Encl., (2) M25 entries FM, cFM, IECEx & ATEX approved with FSX-A014R Optional Registered HART Module for FS24X Detectors Factory installed.
    • FS24X-212-24-1 FS24X-211-24-1 QuadBand™ IR3+ Detector, 316 Stainless Steel Encl. (2) M25 entries FM, cFM, IECEx & ATEX approved with FSX-A014R Optional Registered HART Module for FS24X Detectors Factory installed.
    FS24X-911 Kits
    • FS24X-912-21-1 FS24X-911-21-1 QuadBand™ IR3+ Detector, Copper-Free Aluminum Encl., (2) ¾"NPT entries FM, cFM, IECEx & ATEX approved with FSX-A014R Optional Registered HART Module for FS24X Detectors Factory installed.
    • FS24X-912-22-1 FS24X-911-22-1 QuadBand™ IR3+ Detector, 316 Stainless Steel Encl., (2) ¾" NPT entries FM, cFM, IECEx & ATEX approved with FSX-A014R Optional Registered HART Module for FS24X Detectors Factory installed.
    • FS24X-912-23-1 FS24X-911-23-1 QuadBand™ IR3+ Detector, Copper-Free Aluminum Encl., (2) M25 entries FM, cFM, IECEx & ATEX approved with FSX-A014R Optional Registered HART Module for FS24X Detectors Factory installed.
    • FS24X-912-24-1 FS24X-911-24-1 QuadBand™ IR3+ Detector, 316 Stainless Steel Encl. (2) M25 entries FM, cFM, IECEx & ATEX approved with FSX-A014R Optional Registered HART Module for FS24X Detectors Factory installed.
    Accessories
    • SM4 Stainless Steel Swivel mounting assembly for FS24X, FS20X, SS4, SS2 detectors
    • PSU-12 Universal charger for Fire Sentry Test Lamps and Interface Kits. For 110-240 VAC with international plugs
    • TL-2055 IR Test lamp for testing FSX detectors, explosion proof version. Incl universal charger
    • TL-1055 IR Test lamp for testing FSX detectors, non-explosion proof version. Incl universal charger
    • SH-001 Sunshield for SS2, SS4 & FS24X Detectors, 316 Stainless Steel
    • FSX-A001 FSX Interface Kit with Interface Module, RS485 Cable, USB Cable, Power Adapter and Windows PC Software
    • FSX-A002 FSX Interface Module with RS485 Cable
    • FSX-A014R Optional Registered HART Module for FS24X Detectors
    Spare Parts
    • FS24X-211-10 Use FS24X-911-10 (below)
    • FS24X-911-10 Replacement Electronics Module for 911 and 211 Series standard temperature range detector
    • FS24X-911-10-6 Replacement Electronics Module for 911 (90° FoV)Series standard temperature range detector. EN54-10.
    • FS24X-212-10 Use FS24X-912-10 (below)
    • FS24X-912-10 Electronics Module with Registered HART Communication for 911 and 211 series.
    • FSX-A006 Replacement IR Bulb for TL1055 and TL2055
    Write Your Own Review
    You're reviewing:Honeywell Fire Sentry FS24X Flame Detector
    Your Rating

    Sign up for our latest offers

    By submitting your details you consent to their use in accordance with our Privacy Notice