Honeywell Analytics FS24X Flame Detector

The Honeywell Analytics FS24X Flame Detector is a high-performance Multi-Spectrum QuadBand Triple IR flame detector designed for demanding industrial fire and flame detection applications. Part of the FSX family of electro-optical fire detectors, the FS24X uses WideBand IR™, WideBand 4.3 micron IR™, and visible detection technology to identify hydrocarbon and non-hydrocarbon fuel fires while helping reduce false alarms.

Built with sophisticated software algorithms and dual microprocessors, the FS24X delivers fast, reliable flame detection with selectable sensitivity levels, flexible output options, event logging, and advanced diagnostics. Its wide field-of-view options and long-range detection capability make it suitable for refineries, pipelines, offshore platforms, storage terminals, gas processing facilities, aircraft hangars, power plants, and other hazardous industrial environments.

The Honeywell Analytics FS24X Flame Detector is available through Westech Industrial in Ontario, Quebec, Newfoundland and Labrador, and the Maritimes. Westech can support product selection, service requirements, and integration with industrial safety systems, including custom fabrication capabilities for panels, shelters, enclosures, and project-specific solutions.

Honeywell Analytics FS24X Flame Detector

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Description

Multi-Spectrum QuadBand Triple IR Detection

The FS24X flame detector uses Multi-Spectrum QuadBand Triple IR technology for demanding fire detection applications. It senses WideBand IR radiant energy across four sensor bands. These bands span approximately 0.4 to 5.0 microns. As a result, the detector can identify hydrocarbon and non-hydrocarbon flames. This makes it a strong choice for industrial fire protection systems.

WideBand IR and Visible Detection Technology

The FS24X combines WideBand IR™, WideBand 4.3 micron IR™, and visible detection technology. Together, these technologies help the detector recognize fire signatures with greater confidence. In addition, the visible sensor helps support false alarm rejection. This is important in sites with sunlight, lamps, heaters, or welding activity.

Strong False Alarm Rejection

The detector uses patented Electronic Frequency Analysis™ and advanced software algorithms. These features help separate real fire events from common nuisance sources. Therefore, operators can rely on more stable flame detection in challenging environments. The FS24X also supports dependable performance in applications with changing light and process conditions.

Selectable Sensitivity Levels

The FS24X includes four switch-selectable sensitivity settings. Users can choose Very High, High, Medium, or Low sensitivity. This flexibility helps match the detector to the required coverage area. It also allows teams to adjust the response profile for each application. As a result, facilities can improve detection layout and system performance.

Wide Field-of-View Options

The detector is available with different field-of-view options. The FS24X-2 offers a 110° cone of vision. Meanwhile, the FS24X-9 provides a 90° cone of vision. These options help support different flame detection layouts. They also help users manage coverage in open areas, equipment rooms, or controlled viewing zones.

Dual Microprocessor Reliability

Dual microprocessors help the FS24X process signals quickly and reliably. One microprocessor handles high-speed sampling and signal processing. The second microprocessor manages sensor data, communications, self-diagnostics, and memory functions. Therefore, the detector supports dependable operation in critical industrial safety applications.

FirePic™ and Event Logging

FirePic™ stores pre-fire event data in non-volatile memory. This data can support review after a fire event. In addition, the detector includes an event log with date and time stamp. These features help maintenance teams investigate alarms, review detector activity, and support troubleshooting.

Flexible Outputs and Communication

The FS24X supports several output and communication options. These include alarm, fault, and auxiliary relays. It also supports non-isolated 0–20 mA analog output, RS-485 ModBus, and RS-485 FireBus II. Optional HART communication is also available on applicable models. Therefore, the detector can integrate with many fire and safety systems.

Automatic Optical Path and Electronic Self-Test

Built-in through-the-lens self-testing monitors the detector’s optical path. It also checks the sensor array and electronics module. This helps identify window lens obscuration or detector faults. As a result, maintenance teams can respond before performance is affected.

Rugged Hazardous-Area Construction

The FS24X is built for demanding hazardous-area applications. It is available in copper-free powder coated aluminum or 316 stainless steel. The enclosure carries IP66 and NEMA 4 & 4X ratings. In addition, the detector offers high EMI and RFI immunity. This rugged design helps support reliable operation in harsh industrial environments.

Applications

The Honeywell Analytics FS24X Flame Detector is suitable for industrial facilities where fast flame detection and false alarm rejection are critical. Typical applications include:

  • Refineries and oil production facilities
  • Offshore drilling and production platforms
  • Gas processing plants and natural gas facilities
  • Turbine and compressor enclosures
  • Oil and gas pipelines and pumping stations
  • LNG, LPG, and CNG facilities
  • Rail, truck, loading, and unloading terminals
  • Crude oil, gasoline, and product storage tank farms
  • Petrochemical and chemical production facilities
  • Ethanol, methanol, and IPA production and storage
  • Aircraft hangars and airport terminals
  • Paint and solvent storage areas
  • Power and cogeneration plants
  • Marine terminals and marine engine rooms
  • Gas compressor buildings
  • General warehouses and cold storage warehouses

Documents

Honeywell Analytics_Fs24x_Manual_June2026_Westech.pdf

Honeywell Analytics_FS24X_Performance Addendum_June2026_Westech.pdf

Honeywell Analytics_Fs24x_Spec sheet_Jan 10,2020_Westech.pdf

Manufacturer info

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.

https://www.honeywellanalytics.com/

SPECS

Product:
Honeywell Analytics FS24X Flame Detector.
Detector Type:
Multi-Spectrum QuadBand Triple IR flame detector.
Detection Technology:
WideBand IR™, WideBand 4.3 micron IR™, and visible detection.
Fire Types:
Hydrocarbon and non-hydrocarbon flames and fires.
Spectral Sensitivity:
0.4 to 5.0 microns.
Field of View:
FS24X-9: 90° cone of vision, ±45° from on axis; FS24X-2: 110° cone of vision, ±55° from on axis.
Sensitivity Settings:
Very High (200 ft), High (150 ft), Medium (100 ft), and Low (50 ft).
Detection Range:
Very High sensitivity performance includes indoor and outdoor response data for n-Heptane, IPA, and methane fuel fires. Actual distance and response times may be affected by ambient light, airflow, atmospheric moisture, and fire size stability.
Typical Outdoor Response:
n-Heptane 12 in x 12 in (0.3 m x 0.3 m) fire: 200 ft (61 m) at 4.2 seconds and 264 ft (80 m) at less than 15 seconds; IPA 12 in x 12 in (0.3 m x 0.3 m) fire: 175 ft (53 m) at less than 5 seconds; methane 48 in x ⅜ in (1.2 m) plume: 90 ft (27 m) at less than 8 seconds
Typical Indoor Response:
n-Heptane 6 in x 6 in (0.15 m x 0.15 m) fire at 90 ft (27 m): 5 seconds; IPA 6 in x 6 in (0.15 m x 0.15 m) fire at 90 ft (27 m): less than 8 seconds; methane 48 in x ⅜ in (1.2 m) plume at 90 ft (27 m): less than 5 seconds
False Alarm Immunity:
Tested against false fire sources including direct sunlight, reflected sunlight, arc welding, electric heaters, fluorescent lamps, halogen lamps, sodium vapor lamps, and incandescent lamps.
Operating Voltage:
24 Vdc nominal (18 to 32 VDC).
Analog Output:
0 to 20 mA, source or sink, user selectable.
Relay Outputs:
Fire alarm SPDT, fault SPST, auxiliary SPDT.
Relay Contact Rating:
1 Amp at 24 VDC resistive.
Digital Communication:
RS-485 ModBus RTU and RS-485 FireBus II.
Optional Communication:
HART plug-in module, not available on EN54-10 units.
Visual Indicators:
Green LED for power, red LED for alarm, yellow LED for fault.
Operating Temperature:
FS24X-2: -40°C to +85°C (-40ºF to +185ºF); FS24X-9: -60°C to +85°C (-76°F to +185°F)
Storage Temperature:
-55°C to +105°C (-67ºF to +221ºF).
Operating Humidity:
0 to 95% RH, 100% RH condensing for short periods.
Enclosure Material:
Copper-free aluminum or 316 stainless steel.
Enclosure Rating:
IP66 / NEMA 4X.
Conduit Entries:
Two ¾ in. NPT or two 25 mm entries.
Wiring:
12 AWG to 22 AWG stranded conductors.
Mounting:
Optional swivel bracket assembly.
Certifications and Approvals:
FM, ATEX/IECEx, CE mark, INMETRO, CU-TR, EN54-10:2002 FS24X-9 option, and FM 3260 performance.
Hazardous Area Classifications:
Class I, Division 1; Class II, Division 1; Class III; Class I, Zone 1 AEx d / Ex d IIC; ATEX/IECEx Ex db IIC and Ex tb IIIC classifications.
SIL:
Meets SIL 2 requirements; FMEDA available on request.
Warranty:
Three years from date of shipping.

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PRODUCT FAQ's

What type of flame detector is the Honeywell Analytics FS24X?
The FS24X is a Multi-Spectrum QuadBand Triple IR flame detector that uses infrared and visible detection technology to identify hydrocarbon and non-hydrocarbon fires in industrial environments.
What makes the FS24X different from standard IR flame detectors?
The FS24X uses WideBand IR detection, WideBand 4.3 micron IR detection, visible sensing, patented Electronic Frequency Analysis™, and advanced software algorithms. This combination helps improve flame detection performance while reducing nuisance alarms from non-fire sources.
What is the detection range of the FS24X Flame Detector?
The FS24X provides Very High sensitivity response data for several fuel types. Typical outdoor performance includes a 12 in. x 12 in. (0.3 m x 0.3 m) n-Heptane fire at 200 ft (61 m) with a 4.2 second response, a 12 in. x 12 in. (0.3 m x 0.3 m) n-Heptane fire at 264 ft (80 m) with a response under 15 seconds, a 12 in. x 12 in. (0.3 m x 0.3 m) IPA fire at 175 ft (53 m) with a response under 5 seconds, and a 48 in. x ⅜ in. (1.2 m) methane plume at 90 ft (27 m) with a response under 8 seconds. Actual response distance and time can vary depending on site conditions, including ambient light, airflow, atmospheric moisture, and fire size stability.
Can the FS24X detect non-hydrocarbon fires?
Yes. The FS24X is designed to detect both hydrocarbon and non-hydrocarbon flames and fires, making it suitable for a wide range of industrial applications where different fuel sources may be present.
What output options are available with the FS24X?
The FS24X offers fire alarm, fault, and auxiliary relay outputs, 0–20 mA analog output, RS-485 ModBus RTU, RS-485 FireBus II, and optional HART communication. HART is not available on EN54-10 units.
Where is the Honeywell Analytics FS24X Flame Detector available from Westech Industrial?
The Honeywell Analytics FS24X Flame Detector is available through Westech Industrial in Ontario, Quebec, Newfoundland and Labrador, and the Maritimes.
Can Westech Industrial support installation or integration requirements?
Yes. Westech Industrial can support customers with product selection, service capabilities, and integration support for industrial flame detection applications. For projects requiring a broader instrumentation or safety system approach, Westech can also support custom fabrication requirements where applicable.
What enclosure materials are available for the FS24X?
The FS24X is available in copper-free aluminum or 316 stainless steel enclosure options, with IP66 / NEMA 4X protection for demanding industrial environments.