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Spectrex Inc.

40/40U-UB UV Flame Detector

Detects hydrocarbon-based fuel and gas fires, invisible hydrogen flames, and fires from hydrides, ammonia, silane and other organics

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Have questions? We're here to help!

The new 40/40 UV Flame Detector detects hydrocarbon-based fuel and gas fires, invisible hydrogen flames, and fires from hydrides, ammonia, silane and other organics. The 40/40U-UB is the most durable and weather resistant UV flame detector currently on the market. Its new features include a heated window to eliminate condensation and icing; HART capabilities, 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 to IEC 61508.

The model 40/40UB includes a Built-in-Test (BIT) feature, whereas the 40/40U model does not.

Note: This type of detector should not be exposed to UV radiation sources such as welding, sparks, and electric arcs as it will cause false alarms.

• UV spectrum design
• Automatic and Manual Built-In-Test (BIT) - to assure continued reliable operation (in 40/40UB 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 40/40UB 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
• 3rd party Performance Tested
  - EN54-10 (VdS)
  - FM3260 

Spectral ResponseUV 0.185-0.260 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
Ethanol 95% 37 / 11
Methanol 25 / 7.5
IPA (Isopropyl Alcohol) 37 / 11
Hydrogen* 39 / 12
Methane* 43 / 13
LPG* 43 / 13
Polypropylene Pellets 33 / 10
Silane** 22 / 7
Office Paper 20 / 6
Response TimeTypically 3 seconds
Adjustable Time DelayUp to 30 seconds
Sensitivity Ranges1 ft2 (0.1m2) n-heptane pan fire from 50 ft (15m)
Field of ViewHorizontal 100º; Vertical 95º
Built-in-Test (BIT)Automatic (and Manual)
Temperature RangeOperating: -67ºF to +167ºF (-55ºC to +75ºC)
Option: -67ºF to +185ºF (-55ºC to +85ºC)
Storage: -67ºF to +185ºF (-55ºC to +85ºC)
HumidityUp to 95% non-condensing (withstands up to 100% RH for short periods)
Heated OpticsTo eliminate condensation and icing on the window

  • Thumbnail of document 4040u ub datasheet 2489
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    4040u ub datasheet 2489

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