Spectrex 40/40UFL Ultra Fast UV/IR Flame Detector – ATEX & IECEx Zone 1 Hazardous Area & SIL2

Spectrex 40/40UFL Ultra Fast UV IR Flame Detector

Spectrex 40/40UFL Ultra Fast UV IR Flame Detector

Flame Detector

Hazardous Area | ATEX Certified

Spectrex flame detectors are trusted and specified throughout the UK and international hazardous area industries to provide reliable flame detection in potentially explosive atmospheres according to IECEx and ATEX (Zone 1 & Zone 2).

The new SharpEye UV-IR High-Speed Optical Flame detector 40/40UFL by Spectrex is designed to meet two major requirements:

  • High-Speed Response (20 msec)
  • High Reliability (immunity to false alarm)

This Spectrex detector is based on our well known military detector used in Armored Vehicle Explosion Suppression System combined with the industrial detector 40/40LB.

The 40/40UFL can detect hydrocarbon-based fuel and gas fires, hydroxyl and hydrogen fires, as well as metal and inorganic fires.

The UV/IR flame detector senses radiant energy in the short wave section of both the ultraviolet and infrared portions of the electromagnetic spectrum.

The signals from both sensors are analysed for frequency, intensity and duration. Simultaneous detection of radiant energy in both the UV and IR sensors triggers an alarm signal.

The UV sensor incorporates a special logic circuit that helps prevent false alarms caused by solar radiation.

Spectrex 40/40UFL Ultra Fast UV/IR Features & Benefits

  • UV/IR Dual-Sensor
  • High-Speed Response – 20 msec response to flash fire
  • Solar blind
  • Automatic Built-In-Test (BIT) and manual – to assure continued reliable operation
  • Heated window – for operation in harsh weather conditions (snow, ice, condensation)
  • Multiple output options for maximum flexibility and compatibility
    • Relays (3) for Alarm, Fault and Auxiliary
    • Analogue output for fast detection
    • 0-20mA (stepped)
    • HART Protocol for maintenance and asset management
    • RS-485, Modbus Compatible
  • High reliability – MTBF – minimum 150,000 hours
  • Approved to Safety Integrity Level 2 (SIL2 – TUV)
  • 5-Year warranty
  • User programmable via HART or RS-485
  • Hazardous area zones:
    • Zones 1 & 2 with IIC gas group vapors present
    • Zones 21 & 22 with IIIC dust type present
  • Ex approved to:
    • ATEX & IECEx
    • FM/FMC/CSA
    • TR CU (EAC)
  • 3rd party performance
    • EN54-10 (VDS)
    • FM3260
  • Reliability
    • IEC61508 – SIL2 (TUV)

Spectrex 40/40UFL UV/IR – Specification

Spectral ResponseUV: 0.185 – 0.260 µm; IR: 2.5-3.0 µm
Detection Range (at highest Sensitivity Setting for 1ft² (0.1m²) pan fire)
Fuel ft / m
n-Heptane 66 / 22
Gasoline 66 / 20
Diesel Fuel 49 / 15
JP5 50 / 15
Kerosene 50 / 15
Ethanol 95% 25 / 7.5
Methanol 26 / 8
IPA (Isopropyl Alcohol) 43 / 13
Hydrogen* 37 / 11
Methane* 26 / 8
LPG* 43 / 13
Polypropylene Pellets 43 / 13
Ammonia** 20 / 6
Silane** 6 / 1.8
Office Paper 16 / 5
*30* (0.75m) high, 10* (0.25m) width plume fire
**20* (0.5m) high, 8* (0.2m) width plume fire
Response TimeTypically 3 sec. High speed 20 msec to flash fire
Adjustable Time DelayUp to 30 seconds
Field of ViewHorizontal 100º; Vertical 90º
Built-in-Test (BIT)Automatic
Temperature RangeOperating: -67ºF to +167ºF  (-55ºC to +75ºC)
Option: -67ºF to +185ºF  (-55ºC to +85ºC)
Storage: -67ºF to +185ºF  (-55ºC to +85ºC)
Humidity Up to 95% non-condensing (withstands up to 100% RH for short periods)
Heated OpticsTo eliminate condensation and icing on the window


Operating Voltage     24 VDC nominal (18-32 VDC)
Power ConsumptionStandby: Max. 90mA (110mA with heated window) Alarm: Max. 130mA (160mA with heated window)
Cable Entries 2 x 3/4″ – 14NPT conduits or 2 x M25 x 1.5 mm ISO
Wiring 12 – 22AWG  (0.3mm2  – 2.5mm2)
Electrical Input Protection According to MIL-STD-1275B
Electromagnetic Compatibility EMI/RFI protected to EN61326-3 and EN61000-6-3
Electrical Interface   The detector interface includes 12 terminals with 5 wiring options (factory set)


40/40UFL UV/IR Flame Detector

ATEX & IECEx Zone 1 Hazardous Area & SIL2

Ex approved for Zone 1 hazardous area location

Spectrex Flame Detectors

Spectrex Flame Detectors are ATEX & IECEx Certified.

  • ATEX
  • IECEx
  • FM/FMC
  • CSA
  • TR CU (EAC)

3rd party performance tested

  • EN54-10 (Vds)
  • FM3260 (FM)

SPECTREX 40/40UFL Applications

  • Offshore oil & gas installations
  • Onshore oil & gas installations and pipelines
  • Chemical plants
  • Petrochemicals plants
  • Storage tank farms
  • Aircraft hangars
  • Power generation facilities
  • Pharmaceuticals
  • Printing
  • Warehouses
  • Automotive
  • Explosives & Munitions
  • Waste disposal facilities
  • Aerospace industry
  • Paint, polymer and glue processes

Emerson Process Management Acquisition With Spectrex

In 2015 Spectrex were acquired by Emerson Process Management. The acquisition has strengthened Emerson’s product offering as they now have a comprehensive line of flame, gas and ultrasonic leak detector solutions used for safety monitoring in the industry.

Spectrex Flame Detectors

Spectrex Flame Detectors : Infra-red (IR) & ultra-violet (UV) based flame detectors for quickly detecting flames from gas and fuel fires generated from hydrocarbons, hydrogen, metals, inorganic and hydroxyl sources.

 ➡ T&D Sales Team are able to support the specification and supply of their flammable and toxic gas detectors. Additionally, T&D are CompEx Certificated and competent in understanding hazardous area classifications and site requirements for the sale of explosion and flameproof equipment.

Flame, Heat, Gas Detectors & Detection Systems

ATEX Beacon

Hazardous area industries including offshore oil/gas platforms and FPSOs, onshore oil refineries, processing plants, pipelines, storage farms and LPG/LNG plants all utilise or produce a wide range of hazardous flammable liquids and gases that can be detected using correctly specified flame and gas detectors.

Detecting toxic and flammable gases requires the detectors to be classified and certified according to the specific IECEx or ATEX standard – we distribute flame detectors manufactured by Spectrex to operate in the harshest environmental conditions including self-contained stand-alone devices designed for direct connection to control and alarm systems or automatic fire extinguishing systems.

Our range of Hazardous Area Fire & Gas Detection System products also includes Explosion Proof Warning Systems – comprehensive range of intrinsically safe, flameproof and explosion proof alarm sounders, sirens, bells and horns, loudspeakers and beacons.

Detect Flame Heat Gas ATEX

Thorne & Derrick | Detecting Flame | Heat | Gas