FS20X Plus fixed flame detectors

Overview

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Key features

Fast response to a wide range of Hydrocarbon, non-Hydrocarbon, and Hydrogen fires even in low visibility conditions
Advanced diagnostics including window clarity to maintain site protection
Wideband sensing technology can offer safety coverage even in limited visibility
No field calibration required, simple bump with test lamp
Electro-optical module enables quick replacement in the field
PC App allows simple set-up and interrogation including access to Event Logs and FirePics.

Applications

Confined space entry
Oil, gas and petrochemical
Wastewater and sewage
Steel and chemical plants

Standards and certification

EN 54-10

IEC61508

ATEX

IECEX

Supplier: ISO 9001:2015 certified

PRODUCT DATASHEETDoc. SSLS/DS/GD-020 · Rev. 01 · 13-Oct-2026

FS20X Plus fixed flame detectors – technical data

Technical specifications

Brand	Honeywell
Weight range	Aluminum: 1.7 kg (3.7 lbs), Stainless Steel: 3.4 kg (7.4 lbs)
Humidity Range	0–99% relative humidity
Analog Output Signal Type	4-20mA – Source, Sink or Isolated
Number of Analog Inputs	1
Connector Type	2 x M25 or 2 x ¾” NPT Entries
Relay Rated Load	2A at 32 VDC
Relay Output Configuration	Alarm, Fault, and Auxiliary
Relay Activation Settings	Single Pole Double Throw (SPDT)
Sensing Method	Ultraviolet (UV) / Triple Infrared (IR)
Number of Relay Outputs	3
Certifications - Performance	EN54-10: Class1 (Medium, High, Very High Sensitivities), Class 2 (Low Sensitivity) - Pending / FM3260 - Pending
Certifications - Other	IEC61508 SIL 2 Certified by TÜV Sud - Pending / Maritime Type approved to ABS, Lloyds, BV, DNV, MED, USCG - Pending
Certifications - Hazloc	ATEX: II 2 G Ex db IIC T5 Gb; II 2 D Ex tb IIIC T135° C Db IP66/67; / CCCF - Pending / CUTR - Pending / IECEx: Ex db IIC T5 Gb; Ex tb IIIC T135° C Db IP66/67 / INMETRO / NEMA 4X / cFMus: Class I, Div 1, Grps A,B,C,D; Class II/III, Div 1, Grps E,F,G
NEMA Rating	Type 4X
Ingress Protection	IP66/67
Datalogging	5000 events and ten 30-second FirePics
Features	High-visibility halo light ring / Modbus, HART, 4-20 mA Source, Sink or Isolated, Relays Standard / Mounting bracket and sunshade as standard included / Multiple marine certifications / Proved UV + triple IR sensor technology
Relay Included	Yes
Visual Indicators	LED halo light ring - Green, Yellow, Red

PRODUCT DATASHEETDoc. SSLS/DS/GD-020 · Rev. 01 · 13-Oct-2026

FS20X Plus fixed flame detectors – technical data, continued

Technical specifications

Replacement Parts	FS20XP-PUCK
Material	Electropolished CFM8 Stainless Steel / Low Copper Aluminum with Marine Grade Paint
Operating Current	1.8 Watts (Nominal) / 12 Watts (max) = with heater ON 100% duty cycle. / 2.4 Watts (Alarm)
Industry	Commercial Buildings / Logistics & Warehouses
Standards	EN 54-10, IEC61508, ATEX, IECEX

Ordering information

Brand	Honeywell

Inspection and care

Keep sensors and filters clean, charge batteries as directed and record bump tests and calibrations.

Storage

Store in a cool, dry place away from direct sunlight, heat and chemicals.

Data given in good faith from manufacturer information and subject to change without notice. Select PPE based on a site risk assessment. Scan the code for the product page.