Spectrex 40/40UFI Ultra Fast Triple IR (IR3) Flame Detector – ATEX & IECEx Zone 1 Hazardous Area

Spectrex 40/40UFI Ultra Fast Triple IR (IR3) Flame Detector

Spectrex 40/40UFI Ultra Fast Triple IR (IR3) 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 Spectrex 40/40UFI, an Ultra-Fast multispectrum IR3 Flame Detector manufactured by Spectrex, detects hydrocarbon fuel and gas fires at long distances, and is especially designed to detect an explosive 1 ft (0.3m) diameter gas cloud explosion in max. 50 msecs for 1ft diameter sphere methane-air mixture explosion at 66 ft (20m) with the highest immunity to false alarms.

The 40/40UFI IR3 can also detect a 1 ft2 (0.1m2) gasoline/n-Heptane pan fire at up to 300 ft (90m).

The Spectrex 40/40UFI is part of the 40/40 Series, the most durable and weather resistant range of flame detectors currently on the market.

Features of the flame detector include a heated window, to eliminate condensation and icing; HART capability for digital communications; lower power requirements; and a compact, lighter design.

Due to increased reliability, the 40/40 Series warranty period has been extended to 5 years and is SIL2 (TUV) approved per IEC 61508.

Spectrex 40/40UFI UV/IR Flame Detector Features & Benefits

  • Multi Spectrum Design – for long distance detection and high false alarm immunity
  • High Speed Response – 50 msec
  • Sensitivity Selection – to ensure no zone crossover detection
  • Automatic Built-In-Test (BIT) – 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
  • Safety Integrity Level SIL2 (TUV)
  • 5-Year WarrantyUser 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 (FM)

Spectrex 40/40UFI UV/IR – Specification

Spectral ResponseThree IR Bands
Detection Range (at highest Sensitivity Setting for 1ft² (0.1m²) pan fire)
Fuel ft / m
n-Heptane 300 / 90
Gasoline 300 / 90
Diesel Fuel 205 / 62
JP5 205/62
Kerosene 205 / 62
Ethanol 95% 185 / 55
Methanol 160 / 48
IPA (Isopropyl Alcohol) 185/55
Methane* 205 / 62
LPG* 205 / 62
Polypropylene Pellets 160 / 48
Office Paper 115/34
High Speed Response50 msec for 1ft diameter sphere methane-air mixture explosion at 66ft (20m)
Response TimeTypically 2 sec at 131ft (40m) Typically 10 sec at 300ft (90m)
Adjustable Time DelayUp to 30 seconds
Sensitivity Ranges4 Sensitive ranges for 1 ft2 (0.1m2
Field of ViewHorizontal 90º; 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)


40/40UFI 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 40/40UFI TRIPLE IR (IR3) 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