Spectrex 40/40U – UV Flame Detector


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

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The new Spectrex 40/40U Flame Detector can detect hydrocarbon-based fuel and gas fires, invisible hydrogen flames, fires from hydrides, ammonia, silane and other organics.

Currently, the 40/40U is the most durable and weather resistant UV Flame Detector on the market. The new features include a heated window for eliminating condensation and icing, HART capabilities for digital communications, low power requirement and a compact, lighter design.

Due to increased reliability, the Spectrex 40/40 Series warranty period has been extended to 5 years and is approved to IEC 61508 Safety Integrity requirements of SIL2 (TUV).

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:
3rd party Performance Tested
-EN54-10 (VdS)

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