Spectrex 40/40LB UV/IR Flame Detector


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Delivery Time: 1-3 Business Days (when in stock)

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The Spectrex 40/40LB is a combination of UV and IR sensors. The IR sensor operates at a wavelength of 2.5-3.0 µm. The 40/40LB can detect hydrocarbon-based fuel and fires, hydroxyl and hydrogen fires, as well as metal and inorganic fires.

The Spectrex 40/40LB UV/IR Flame Detector can sense radiant energy in the short wave section of both the UV and IR portions of the electromagnetic spectrum. Both sensors have signals that are analysed for frequency, intensity and duration. Simultaneous detection of radiant energy in both the UV and IR sensors will trigger an alarm signal. The UV sensor incorporates a special logic circuit that helps prevent false alarms caused by solar radiation.

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:
3rd party performance approved
-EN54-10 (VdS)
Marine Approval
-MED “Wheelmark” approval (DNV)
-IEC61508 – SIL2 (TUV)

Additional information

Wiring option

Fault Relay N.C. | Alarm Relay N.O. | 0-20 mA Sink | RS-485 | HART, Fault Relay N.C. | Alarm Relay N.O. N.C. | 0-20 mA Source | RS-485 | HART


-55°C to 75°C | 3/4" NPT, -55°C to 75°C | M25

Housing Material

Aluminum | ATEX / IECEx, Stainless Steel | ATEX / IECEx, Stainless Steel | Factory Mutual, CSA