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Product Features
  • UV/IR Dual-Sensor
  • High-Speed Response
  • Solar blind
Delivery options

At Cadmus Products we aim to deliver orders efficiently and at highly competitive rates. 

  • We can ship consignments of all shapes and sizes and hazardous content across the UK and worldwide. Most of our orders are sent via DHL, however sometimes we may use other couriers.
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    with our best shipping prices along with your quote.
  • Please see our delivery page for full information

Crowcon SharpEye 40/40 UV/IR Flame Detector Series

There are two versions of the 40/40 Series UV/IR Flame Detectors:

  • Model 40/40L (& LB) 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.

  • Model 40/40L4 (& L4B) is identical to the 40/40L except that the IR sensor works at a wavelength of 4.5 μm and is only suitable for hydrocarbon-based 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 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.

Key Features:

  • UV/IR Dual-Sensor
  • High-Speed Response - 150 msec Response to Saturated Signal
  • 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
    - 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) Models 40/40LB and 40/40L4B only
  • 5-Year Warranty
  • User Programmable via HART or RS-485
  • Ex approved for Zone 1 hazardous area location
    - ATEX
    - IECEx
    - FM/FMC
    - CSA
  • 3rd party Performance Tested
    - EN54-10 (LPCB)
    - FM3260 (FM)


  • Offshore Oil & Gas installations
  • Onshore Oil & Gas installations and pipelines
  • Chemical plants
  • Petrochemicals plants
  • Storage Tank farms
  • Aircraft hangars
  • Power Generation facilities
  • Pharmaceutical Industry
  • Printing Industry
  • Warehouses
  • Automotive Industry
  • Explosives & Munitions
  • Waste Disposal facilities
  • Aerospace Industry
  • Paint, Polymer and Glue processes

Please note - Product designs and specifications are subject to change without notice. The user is responsible for determining the suitability of this product.

Product Specification

Spectral Response - 40/40L–LB: UV: 0.185 - 0.260 μm; IR: 2.5-3.0 μm
- 40/40L4–L4B: UV: 0.185 - 0.260 μm; IR: 4.4-4.6 μm
Detection Range (at highest Sensitivity Setting for 1ft2 (0.1m2) pan fire) - n-Heptane: 50ft / 15m
- Gasoline: 50ft / 15m
- Diesel Fuel: 37ft / 11m
- JP5: 37ft / 11m
- Kerosene: 37ft / 11m
- Ethanol 95%: 25ft / 7.5m
- Methanol: 25ft / 7.5m
- IPA (Isopropyl Alcohol): 25ft / 7.5m
- Hydrogen** 16ft / 5m
- Methane*: 16ft / 5m
- LPG *: 16ft / 5m
- Polypropylene Pellets: 1ft3 / 4m
- Office Paper: 16ft / 5m
* 20" (0.5m) high, 8" (0.2m) width plume fire ** 40/40L/LB only
Response Time Typically 5 seconds. High speed 150 msec response to saturated signal
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: -67°F 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 - 22AWG (2.5mm2 - 0.3mm2)
Electrical Input Protection According to MIL-STD-1275B
Electromagnetic Compatibility EMI/RFI protected to EN61326-3 and EN61000-6-3
Electrical Interface The detector includes twelve (12) terminals with five (5) wiring options (factory set)
Relays - Alarm, Fault and Auxiliary
- SPST volt-free contacts rated 5A at 30 VDC or 250 VAC.
0-20mA (stepped) Sink (source option) configuration
- Fault: 0 +1mA
- BIT Fault: 2mA ± 10%
- Normal: 4mA ± 10%
- IR: 8mA ± 5%
- UV: 12mA ± 5%
- Warning: 16mA ± 5%
- Alarm: 20mA ± 5%
- Resistance Loop: 100-600 Ω
HART Protocol Optional HART communications on the 0-20mA analog current (FSK) - used for maintenance, configuration changes and asset management, available in mA source output wiring options
RS-485 RS-485 Modbus compatible communication link that can be used in computer controlled installations
Mechanical Specifications
Enclosure options
- Stainless Steel 316L with electro polish finish
- Heavy duty copper free aluminum (less than 1%), red epoxy enamel finish
Mounting Stainless Steel 316L with electro polish finish
Dimensions Detector: 4" x 4.6" x 6.18" (101.6 x 117 x 157 mm)
Weight - Detector (St.St.) 6.1 lb (2.8 kg)
- Tilt mount 2.2 lb (1.0 kg)
- Detector, aluminum 2.8 lb (1.3 kg)
Environmental Standards Meets MIL-STD-810C for Humidity, Salt & Fog, Vibration, Mechanical Shock, High Temp, Low Temp
Water and Dust IP66 and IP67 per EN60529, NEMA 250 6P
Hazardous Area - ATEX and IECEx: Ex II 2 GD, Ex de IIC T5 (-55ºC to +75ºC), Ex de IIC T4 (-55ºC to +85ºC), Ex tD A21 IP66/X7 T 95ºC, Ex tD A21 IP66/X7 T 105ºC
- FM/FMC/CSA: Class I Div. 1, Groups B, C & D, Class II/III Div. 1, Groups E, F & G
Performance - EN54-10 (LPCB)
- FM-3260 (FM)
Reliability IEC61508 - SIL2 (TUV) - models 40/40LB and 40/40L4B only
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