Honeywell Analytics FS20X

The Honeywell Analytics FS20X is a multi-spectrum UV/Dual IR/VIS fire and flame detector designed for fast, reliable flame detection in demanding industrial environments. Built on the proven foundation of the SS4 detector, the FS20X combines ultraviolet, visible, near band infrared and wide band infrared sensing technologies to detect both hydrocarbon and non-hydrocarbon fires.

The FS20X is engineered to provide long-range flame detection, strong false alarm rejection and reliable operation across a wide temperature range. With selectable sensitivity settings, multiple output options, built-in diagnostics and event storage, it is well suited for hazardous industrial sites where early flame detection is critical.

Available through Westech Industrial in Ontario, Quebec and the Maritimes, the FS20X can be supported as part of a larger fire and gas detection strategy. Westech can assist with product selection, application support, service requirements and custom fabrication for integrated fire and gas solutions, including panels, enclosures and packaged systems where project requirements call for a more complete solution.

Honeywell Analytics FS20X

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Description

Multi-Spectrum UV/Dual IR/VIS Flame Detection

The FS20X uses a combination of ultraviolet, visible, near band infrared and wide band infrared sensing to detect radiant energy from fire. This multi-spectrum approach allows the detector to respond to both hydrocarbon and non-hydrocarbon flames, making it suitable for a wide variety of industrial fire hazards.

Long-Range Fire Detection

With a detection range greater than 60 m / 200 ft for a 0.1 m² / 1 sq. ft. n-Heptane reference fire at the very high sensitivity setting, the FS20X offers extended coverage for larger industrial areas. Its four selectable sensitivity settings allow users to adjust detection distance based on the application.

Fast Response with False Alarm Rejection

The FS20X is designed for fast, false-alarm-resistant response. Patented signal processing, electronic frequency analysis and visible sensor input help distinguish real flame signatures from common false alarm sources. The detector also offers arc welding immunity, making it suitable for challenging industrial settings.

Performance in Challenging Visibility Conditions

If the ultraviolet signal is reduced by heavy smoke or lens contamination, the FS20X’s WideBand IR, Near Band IR and visible sensors can still respond to fire, although with reduced sensitivity and slower response. This helps support dependable flame detection in real-world industrial environments where conditions are not always ideal.

Configurable Outputs and Communications

The FS20X provides flexible integration options, including alarm, fault and auxiliary relays, a user-selectable 0-20 mA analog output, RS-485 ModBus, RS-485 FireBus II and optional HART communication with the FSX-A014 plug-in module for applicable configurations (HART is not available on EN54-10 units). These options make it easier to connect the detector into a range of control and safety systems.

Built-In Self-Test and Diagnostics

Automatic optical path and electronic self-testing help monitor detector health, window condition and sensor operation. The FS20X also includes FirePic™ pre-fire event storage and an event log with date and time stamps, supporting diagnostics, troubleshooting and incident review.

Rugged Industrial Design

Available with copper-free powder coated aluminum or 316 stainless steel enclosure options, the FS20X is built for industrial and hazardous area use. IP66, NEMA 4 and NEMA 4X enclosure ratings support reliable performance in demanding indoor and outdoor environments.

Field-Friendly Installation and Maintenance

Plug-in terminations, selectable configuration switches, visual LED indicators and optional swivel bracket mounting help simplify installation and commissioning. Green, red and yellow LEDs provide quick visual indication of power/normal status, alarm and fault conditions.

Applications

The Honeywell Analytics FS20X is suitable for industrial flame detection applications such as:

  • Refineries and oil production facilities
  • Offshore platforms
  • Petrochemical and chemical processing facilities
  • Oil and gas pipelines and pumping stations
  • Gas compressor buildings and gas processing plants
  • LNG and LPG storage, loading and unloading areas
  • Natural gas and CNG plants
  • Gas turbine and compressor enclosures
  • Crude oil, gasoline and product storage tank farms
  • Hydrogen plants and hydrogen storage areas
  • Acetylene processing and storage
  • Silane gas cabinets, manufacturing and storage
  • Aircraft hangars and engine test cells
  • Marine engine rooms and marine terminals
  • Paint and solvent storage areas
  • Power plants and cogeneration facilities
  • Rail and truck loading and unloading terminals
  • General warehouse fire detection applications

Documents

Honeywell Analytics_Fs20x_Spec sheet_July2024_Westech.pdf

Honeywell Analytics_Fs20x_Manual_July2024_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 FS20X Fire and Flame Detector.
Detector Type:
Multi-Spectrum UV/Dual IR/VIS fire and flame detector.
Fire Detection Capability:
Designed to detect hydrocarbon and non-hydrocarbon fires.
Spectral Sensitivity:
Ultraviolet: 185-260 nm; Visible: 400-700 nm; Near Band IR: 0.7-1.1 microns; Wide Band IR: 1.1-3.5 microns.
Field of View:
90° horizontal cone of vision, ±45° from on axis. Manual mounting guidance also notes an 80° vertical view angle, 45° below and 35° above the centre line. For EN54-10 testing, the field of view is ±40° horizontal and +30°/-40° vertical.
Sensitivity Settings:
Very high: 60 m; High: 45 m; Medium: 30 m; Low: 15 m; switch selectable.
Detection Range:
Greater than 60 m / 200 ft to a 0.1 m² / 1 sq. ft. n-Heptane reference fire at very high sensitivity.
Response Time:
3-5 seconds to a 0.1 m² / 1 sq. ft. n-Heptane fire at 30 m / 100 ft; 3-10 seconds to a 0.1 m² / 1 sq. ft. n-Heptane fire at 60 m / 200 ft.
Operating Voltage:
24 VDC nominal; 18-32 VDC regulated input range.
Normal Operation Current:
85 mA @ 24 Vdc nominal; 175 mA nominal with heater.
Maximum Fire Alarm Current:
135 mA maximum; 220 mA maximum with heater.
Heater:
Heater turns on when temperature drops below -17°C / 0°F.
Relay Outputs:
Fire Alarm: SPDT NO/NC; Fault: SPST NO; Auxiliary: SPDT NO/NC; relay options include energized/de-energized and latching/non-latching configurations.
Relay Contact Rating:
1 Amp @ 24 VDC resistive.
Analog Output:
0-20 mA stepped output; non-isolated source or sink, user selectable.
Analog Current States:
0 mA fault (<0.6 mA); 2 mA dirty window (±0.6 mA); 4 mA normal/safe (±0.6 mA); 8 mA background IR (±0.6 mA); 12 mA background UV (±0.6 mA); 16 mA fire alarm (±0.6 mA); 20 mA verified fire alarm (±0.6 mA).
Loop Resistance:
50-400 Ohms; 400 Ohms maximum load.
Communications:
RS-485 ModBus Protocol; RS-485 FireBus II; RS-485 Special (optional); optional HART plug-in module for applicable configurations (not available on EN54-10 units).
Digital Addressing:
Selectable 7-bit digital address with 128 address options.
Visual Indicators:
Green LED for power/normal status; red LED for alarm; yellow LED for fault.
Operating Temperature:
Standard: -40°C to +85°C / -40°F to +185°F; EN54-10: -10°C to +55°C / -14°F to +131°F.
Storage Temperature:
-55°C to +105°C / -67°F to +221°F.
Operating Humidity:
0 to 95% RH; 100% RH condensing for short periods of time.
Enclosure Materials:
Copper-free powder coated aluminum or 316 stainless steel.
Enclosure Rating:
IP66, NEMA 4 and NEMA 4X.
Dimensions:
Assembly: 4.35 in. / 110.49 mm H x 4.81 in. / 122.24 mm diameter.
Weight:
Aluminum: approximately 1.7 kg / 3 lbs. 11 oz.; Stainless steel: approximately 3.4 kg / 7 lbs. 7 oz.
Conduit Entries:
Two 3/4 in. NPT or two 25 mm conduit entries.
Wiring:
Screw terminal wire sizes from 12 AWG to 22 AWG (2.550 mm to 0.762 mm); stranded conductors required, not solid core; shielded cable recommended.
Vibration:
Meets or exceeds MilSpec 810C Method 514.2, Curve AW12.
Mounting:
Optional swivel bracket assembly; Mounting Holes: 1/4 in. / 6.35 mm diameter, 5 1/2 in. / 139.70 mm center-to-center.
Certifications and Approvals:
FM hazardous area approved; ATEX/IECEx Ex db IIC and Ex tb IIIC; INMETRO; CU-TR; FM 3260 performance; EN54-10 option; SIL rating FMEDA available on request.
Warranty:
Three years from date of shipping.
Westech Availability:
Available in Ontario, Quebec and the Maritimes.

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PRODUCT FAQ's

What is the Honeywell Analytics FS20X?
The Honeywell Analytics FS20X is a multi-spectrum UV/Dual IR/VIS fire and flame detector designed to detect radiant energy from both hydrocarbon and non-hydrocarbon fires. It combines ultraviolet, visible, near band infrared and wide band infrared sensing technologies for fast, reliable flame detection.
What types of fires can the FS20X detect?
The FS20X is designed to detect both hydrocarbon and non-hydrocarbon fires. Common application areas include oil and gas facilities, refineries, LNG/LPG areas, hydrogen storage, silane gas applications, turbine enclosures, chemical facilities, aircraft hangars and power plants.
How far can the FS20X detect a flame?
At the very high sensitivity setting, the FS20X has a detection range greater than 60 m / 200 ft for a 0.1 m² / 1 sq. ft. n-Heptane reference fire. It also includes selectable sensitivity settings for very high, high, medium and low detection ranges.
How does the FS20X help reduce false alarms?
The FS20X uses patented signal processing, electronic frequency analysis and visible sensor input to help identify real fire signatures while rejecting false alarm sources. It is designed for false alarm rejection and includes arc welding immunity for challenging industrial environments.
What outputs and communication options are available?
The FS20X offers alarm, fault and auxiliary relays, a user-selectable 0-20 mA analog output and RS-485 communications with ModBus or FireBus II. An optional HART plug-in module is also available for applicable configurations.
Is the FS20X suitable for hazardous industrial environments?
Yes. The FS20X is designed for hazardous area applications and is available with industrial enclosure options, including copper-free powder coated aluminum and 316 stainless steel. It also carries hazardous area approvals and has IP66, NEMA 4 and NEMA 4X enclosure ratings.
Does the FS20X include self-testing?
Yes. The FS20X includes automatic optical path and electronic self-testing. The detector can monitor window obscuration and check the operation of its sensor array and electronics module. Periodic full system testing with the appropriate test lamp is still recommended.
Is HART communication available on the FS20X?
HART communication is available through the optional FSX-A014 plug-in module for applicable FS20X configurations. It is not available on EN54-10 units.
What is the EN54-10 version of the FS20X?
The EN54-10 version is an FS20X configuration certified to EN54-10:2002 for applications requiring that approval. Some options and ratings differ from the standard FS20X configuration, including HART communication, which is not available on EN54-10 units.
Can Westech Industrial help with FS20X selection and integration?
Yes. Westech Industrial can support FS20X selection for customers in Ontario, Quebec and the Maritimes, including application review, service support and integration considerations. For larger projects, Westech can also support custom fabrication requirements such as integrated fire and gas systems, panels, enclosures and packaged solutions designed around site-specific needs.