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Model 40/40L4 (& L4B) is identical to the 40/40L except that the IR sensor works at a wavelength of 4.5 ï¿œm 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.

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)