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Sieger Fire Sentry FS24X Flame Detectors

Fire Sentry FS24X is a quantum leap in flame and fire detection with its sophisticated software and detection technology.

The Fire Sentry FS24X is the latest generation high technology Multi-Spectrum Triple IR (IR/IR/IR/Visible) Fire and 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 Fire Sentry FS24X is a quantum leap in flame and fire detection. Sophisticated software algorithms and dual microprocessors ensure that the Fire Sentry 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 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 to the fire albeit 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 Fire Sentry 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 which the Detector actually sees. A combination of outputs makes the Fire Sentry FS24X a truly versatile detector for today's demanding industrial requirements.

The Fire Sentry FS24X detector has a detection range greater than 60 m (200 feet) (Very High Sensitivity setting) for the detection of a 0.1 m2 (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.

Data Sheet
Application Chart
Fixed-Point Industrial Fire and Gas Detection Brochure
Fire and Gas Detection for the Petrochemical Industry Brochure
Fire Sentry Accessories Brochure
Fire Sentry Controllers Brochure
Fire Sentry FS24X Specifications
FS24X User Manual


  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
  Wide operating temperature range
  Patented* Electronics Module for components protection with easy plug-in terminations and field installation
  Two 25 mm or ¾" NPT conduit entries
  Low power consumption
  High RFI and EMI immunity
  FM, ATEX, CE mark approvals
  Meets SIL 2 requirements


  Detects hydrocarbon and non-hydrocarbon fuel fires in all environmental conditions
  User selectable outputs
  Optimal false alarm rejection for 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


  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

Ordering Information

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 and ATEX approved
FS24X-211-22-1 QuadBand™ IR3+ Detector, 316 Stainless Steel Encl., (2) ¾" NPT entries FM and ATEX approved
FS24X-211-23-1 QuadBand™ IR3+ Detector, Copper-Free Aluminum Encl., (2) M25 entries FM and ATEX approved
FS24X-211-24-1 QuadBand™ IR3+ Detector, 316 Stainless Steel Encl. (2) M25 entries FM and 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 and ATEX approved
FS24X-911-22-1 QuadBand™ IR3+ Detector, 316 Stainless Steel Encl., (2) ¾" NPT entries FM and ATEX approved
FS24X-911-23-1 QuadBand™ IR3+ Detector, Copper-Free Aluminum Encl., (2) M25 FM and ATEX approvedentries FM and ATEX approved
FS24X-911-24-1 QuadBand™ IR3+ Detector, 316 Stainless Steel Encl. (2) 25mm entries FM and ATEX approved

Please note - Product designs and specifications are subject to change without notice. The user is responsible for determining the suitability of this product.

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