Honeywell FS20X Plus UV/3IR Flame Detector
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Honeywell FS20X Plus Ultra Violet/Triple Infrared Flame Detector
The Honeywell FS20X Plus Ultra Violet/Triple Infrared Flame Detector improves upon the FSX series by adding WideBand IR and UV technology. It detects a wider range of hydrocarbon, non-hydrocarbon, and hydrogen fires at greater distances while reducing false alarms in challenging conditions such as rain, fog, and smoke.
Diversity of Detection
Detects hydrocarbon, non-hydrocarbon, and hydrogen fires using a single device, eliminating the need for multiple specialised flame detectors.
Operation in Harsh Conditions
Designed to operate reliably in extreme environments with temperatures ranging from -55°C to +75°C and up to 99% relative humidity. TÜV SIL2 certified for dependable performance.
Accessories Included
Comes with a redesigned sunshade and mounting bracket. Choose between standard or marine brackets for easy installation on various surfaces.
Extended Detection Distance
Wide-angle, long-range sensors provide rapid flame detection over extended distances.
- Detects a 1 ft² (0.1 m²) n-Heptane fire at up to 275 ft (84 m) in approximately 5 seconds.
- Detects a similar-sized hydrogen fire at up to 90 ft (27 m).
Reduced False Alarms
The combination of one UV sensor and three IR sensors maintains high sensitivity while significantly reducing nuisance alarms caused by environmental interference.
All-in-One Communication
Includes multiple communication options as standard, eliminating the need for complex ordering configurations.
- Modbus
- HART 7
- Relay Outputs
- mA Outputs (Source, Sink, and Isolated)
- Multiple Global Certifications
Advanced Flame Detection Technology
The detector combines one ultraviolet sensor with three infrared sensor bands to detect flames from a wide variety of fuel sources, even under poor visibility conditions.
- Ultraviolet: 0.18 μm – 0.26 μm
- Near-Band IR: 0.7 μm – 1.1 μm
- Wide-Band IR: 0.7 μm – 4.2 μm
- Long-Band IR: 3.0 μm – 5.0 μm
Unlike narrow-band detectors that depend on CO₂ spikes, the Honeywell FS20X Plus monitors multiple wavelength bands to identify developing fires more effectively.
Reliable Performance
The Honeywell FS20X Plus features dual microprocessors for dependable flame detection. One processor manages high-speed signal processing, while the second handles communications, sensor monitoring, self-diagnostics, and event logging for enhanced reliability.
Order Information
Instruments
| Part Number | Description |
|---|---|
| FS20XP-ANGXX | FS20X Plus – UV/3IR – Aluminum – 3/4″ NPT kit includes mount and sunshade. |
| FS20XP-AMGXX | FS20X Plus – UV/3IR – Aluminum – M25 kit includes mount and sunshade. |
| FS20XP-SNGXX | FS20X Plus – UV/3IR – Stainless Steel – 3/4″ NPT kit includes mount and sunshade. |
| FS20XP-SMGXX | FS20X Plus – UV/3IR – Stainless Steel – M25 kit includes mount and sunshade. |
| FS20XP-ANGXM | FS20X Plus – UV/3IR – Aluminum – 3/4″ NPT kit includes marine mount and sunshade. |
| FS20XP-AMGXM | FS20X Plus – UV/3IR – Aluminum – M25 kit includes marine mount and sunshade. |
| FS20XP-SNGXM | FS20X Plus – UV/3IR – Stainless Steel – 3/4″ NPT kit includes marine mount and sunshade. |
| FS20XP-SMGXM | FS20X Plus – UV/3IR – Stainless Steel – M25 kit includes marine mount and sunshade. |
Accessories
| Part Number | Description |
|---|---|
| SM4 | Stainless Steel Swivel Mounting Assembly. |
| SM4-M | Stainless Steel Swivel Mounting Assembly – Marine Version. |
| TL-2055 | Explosion-proof test lamp for FSX and FSX Plus. Includes universal charger. |
| TL-1055 | Non-explosion-proof test lamp for FSX and FSX Plus. Includes universal charger. |
| FS24XP-NFPA-KIT | NFPA conversion kit (terminal blocks). |
| SH-002 | Stainless Steel Sunshade for FS24XP / FS20XP. |
Spares
| Part Number | Description |
|---|---|
| FS20XP-PUCK | FS20X Plus – UV/3IR – Spare Puck Kit. |
| FSX-A006 | Replacement Bulb for TL-1055 or TL-2055. |
| Parameter | Specification |
|---|---|
| Field of View | Oval cone of view (100° horizontal and 90° vertical). 50% of on-axis distance horizontally FoV can extend to 120° (±60°). |
| Sensitivity | Low: 65 ft (20 m), Medium: 130 ft (40 m), High: 195 ft (59 m), Very High: 275 ft (84 m) to 1 ft² (0.1 m²) n-Heptane fire. Configurable via Flame Manager. |
| Response Time | Typically 5 seconds, maximum 10 seconds. Under specific conditions, approximately 3–5 seconds. |
| Operating Voltage | 24 VDC nominal (18–32 VDC), regulated. |
| Power Consumption | 1.8 W (nominal), 2.4 W (alarm), 12 W maximum (heater ON, 100% duty cycle). |
| Output Relays | Alarm, Fault, and Auxiliary: SPDT (NO/NC), de-energized/energized, latching/non-latching, rated 2 A at 32 VDC. |
| Analog Output | 4–20 mA (Source, Sink, or Isolated). Refer to technical manual for wiring configuration. |
| Digital Communications |
Modbus: RS-485 FP2: RS-485 or USB (Honeywell Proprietary Protocol) HART 7 over 4–20 mA |
| Operating Temperature | -55°C to +75°C (-67°F to +167°F). North America: -50°C to +75°C (-58°F to +167°F). |
| Storage Temperature | -55°C to +85°C (-67°F to +185°F). North America: -50°C to +85°C (-58°F to +185°F). |
| Humidity Range | 0% to 99% Relative Humidity. |
| Cable / Conduit Entries | 2 × M25 or 2 × ¾" NPT. |
| Enclosure Materials | Low copper aluminum with marine-grade paint or electropolished CF8M stainless steel. |
| Enclosure Type | IP66 / IP67 (Type 4X). |
| Hazardous Location Certifications |
ATEX: II 2 G Ex db IIC T5 Gb; II 2 D Ex tb IIIC T135°C Db IP66/67 IECEx: Ex db IIC T5 Gb; Ex tb IIIC T135°C Db IP66/67 cFMus: Class I, Div 1 Groups A, B, C, D Class II/III, Div 1 Groups E, F, G, NEMA 4X INMETRO, CU-TR*, CCC* |
| Performance Certifications |
FM 3260 EN 54-10: Class 1 (Medium, High & Very High Sensitivities), Class 2 (Low Sensitivity) |
| Safety Certification | IEC 61508 SIL 2 certified by TÜV SÜD. |
| Marine Certifications | Maritime Type Approved to ABS, Lloyd's, BV, DNV, MED, USCG. |
| Weight (Excluding Accessories) | Aluminum: 1.7 kg (3.7 lb); Stainless Steel: 3.4 kg (7.4 lb). |
Spray Gas
12 litre can with push button and spray straw for quick and easy bump checking. Not suitable for calibration.
| Part Number | Gas Mixture |
|---|---|
| G1-H2S-25-N-12 | 25ppm H2S |
| G1-CO-100-N-12 | 100ppm CO |
| G1-O2-18-N-12 | 18% O2 |
| G4-QUAD-5-12 | 25ppm H2S, 100ppm CO, 2.2% CH4, 18% O2 |
| G5-QUINT-3-12 | 25ppm H2S, 100ppm CO, 2.2% CH4, 0.5% CO2, 18% O2 |
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