40/40U and UB UV Flame Detector

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.


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


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


Third-party Performance tested:

  • EN54-10 (VdS)

  • FM3260


Hazardous Area Ex Approvals: ATEX , IECEx , FM , CSA , Inmetro , CU TR , CIMFR

Functional Approvals: FM , EN54-10 , CPR

Reliability Approvals: SIL2

Other Approvals: CAL FIRE, AFP

FG Manufacturing is a wholly owned subsidiary of Flame Guard USA, LLC.

X-Tinguish® is a Trademark of Flame Guard USA, LLC  All Rights Reserved

I-FIRE™ is a Trademark of Flame Guard USA, LLC  All Rights Reserved

MIS5352878    (800) 855-3924

Support available 24/7/365

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© 2012-2019 by Flame Guard USA LLC  All Rights Reserved / X-Tinguish® is a Trademark of Flame Guard USA,LLC 1000 Butterfield Road Ste 1029 Vernon Hills, IL 60061 USA

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