Crowcon 40/40L4-L4B UV/IR Flame Detector
Part no.
The Crowcon 40/40L4-L4B is identical to the 40/40L-LB, except that the wavelength of the IR sensor works at 4.5 µm and is only suitable for hydrocarbon-based fuel and gas fires.
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Crowcon 40/40L4-L4B UV/IR Flame Detector
The Crowcon 40/40L4-L4B is a high-performance UV/IR flame detector designed for the rapid detection of hydrocarbon fuel and gas fires in hazardous industrial, offshore, marine, and petrochemical environments. Unlike the standard 40/40L-LB model, the 40/40L4-L4B utilizes an infrared sensing wavelength of 4.5 μm, making it specifically optimised for hydrocarbon-based fire detection.
The detector combines ultraviolet (UV) and infrared (IR) sensing technologies, analysing flame characteristics such as frequency, intensity, and duration. An alarm is triggered only when both sensors simultaneously detect the characteristic radiation signature of a flame, providing fast response while minimising false alarms.
Key Features
- Dual UV/IR flame detection technology
- Optimised for hydrocarbon fuel and gas fires
- 4.5 μm infrared sensing technology
- Solar-blind UV sensor design
- Automatic and manual Built-In Test (BIT)
- Heated optical window
- Multiple communication protocols
- Alarm, fault and auxiliary relay outputs
- HART communication for maintenance and asset management
- RS-485 Modbus compatibility
- User programmable configuration
- SIL2 approved model available
- High reliability with MTBF exceeding 150,000 hours
- Five-year manufacturer warranty
Typical Applications
The Crowcon 40/40L4-L4B is ideal for:
- Offshore oil & gas platforms
- FPSOs
- Petrochemical plants
- Refineries
- LNG and LPG terminals
- Compressor stations
- Turbine enclosures
- Fuel storage depots
- Marine engine rooms
- Chemical processing facilities
Technical Specifications
| Specification | Details |
|---|---|
| Product | Crowcon 40/40L4-L4B |
| Type | UV/IR Flame Detector |
| Manufacturer | Crowcon Detection Instruments |
| Detection Technology | Dual UV/IR Sensing |
| IR Wavelength | 4.5 μm |
| Target Fires | Hydrocarbon Fuel and Gas Fires |
| Safety Integrity Level | SIL2 (Model 40/40L4B) |
| Communication Protocols | HART, RS-485 Modbus |
| Analogue Output | 0-20 mA (Stepped) |
| Relay Outputs | Alarm, Fault and Auxiliary |
| Built-In Test | Automatic and Manual |
| Hazardous Area Approval | ATEX, IECEx, FM, CSA |
| Warranty | 5 Years |
| MTBF | Minimum 150,000 Hours |
Downloads for Crowcon 40/40L4-L4B UV/IR Flame Detector.
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