Spectrex 40/40L-LB UV/IR Flame Detector – ATEX & IECEx Zone 1 Hazardous Area & SIL 2

Spectrex 40/40L-LB 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).
Model 40/40L (or LB, with Built-in-test option) by Spectrex provides a combination of UV and IR sensors, where the IR sensor operates at a wavelength of 2.5-3.0 µm, and can detect hydrocarbon-based fuel and gas fires, hydroxyl and hydrogen fires, as well as metal and inorganic fires.
The Spectrex 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 analyzed 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.
Due to increased reliability, the 40/40 Series warranty period has been extended to 5 years and is SIL2 (TUV) approved to IEC 61508.
Spectrex 40/40L-LB UV/IR Flame Detector Features & Benefits
- UV/IR Dual-Sensor
- Solar Blind
- Automatic Built-In-Test (BIT) and Manual- to assure continued reliable operation (in 40/40LB only)
- 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
- 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) – Model 40/40LB only
- 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 approved
- EN54-10 (VdS)
- FM3260
- Marine Approval
- MED “Wheelmark” approval (DNV)
- Reliability
- IEC61508 – SIL2 (TUV) – model 40/40LB only
Spectrex 40/40L-LB UV/IR – Specification
Spectral Response | UV: 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 50 / 15 Gasoline 50 / 15 Diesel Fuel 37 / 11 JP5 37/11 Kerosene 37 / 11 Methanol 25 / 7.5 IPA (Isopropyl Alcohol) 25 / 7.5 Hydorgen* 33 / 10 Methane* 26 / 8 LPG* 43 / 13 Polypropylene Pellets 33 / 410 Office Paper 16 / 5 *30* (0.75m) high, 10* (0.25m) width plume fire |
Response Time | Typically 5 seconds |
Adjustable Time Delay | Up to 30 seconds |
Sensitivity Ranges | 1 ft2 (0.1m2) n-heptane pan fire from 50 ft (15m) |
Field of View | Horizontal 100º; Vertical 95º |
Built-in-Test (BIT) | Automatic (and Manual) |
Temperature Range | Operating: -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 Optics | To eliminate condensation and icing on the window |
ELECTRICAL SPECIFICATIONS
Operating Voltage   | 24 VDC nominal (18-32 VDC) |
Power Consumption | Standby: 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 – 22AWGÂ (0.3mm2Â – 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) |
Spectrex 40/40Â Flame Detector Series
Spectrex 40/40L-LB UV/IR
Flame Detector
ATEX & IECEx Zone 1 Hazardous Area & SIL2
Ex approved for Zone 1 hazardous area location

Spectrex Flame Detectors are ATEX & IECEx Certified.
- ATEX
- IECEx
- FM/FMC
- CSA
- TR CU (EAC)
3rd party performance tested
- EN54-10 (LPCB)
- FM3260 (FM)
- DNV Marine Approval
SPECTREX 40/40L-LB 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 : 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
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.

Thorne & Derrick | Detecting Flame | Heat | Gas