Product Overview
The AutroFlame X33AF is a multispectrum infrared flame detector designed for rapid detection of fires involving light and heavy hydrocarbon fuels.
It uses three infrared sensors with advanced signal-processing technology to distinguish genuine flames from sunlight, hot equipment, welding activity and other potential false-alarm sources. Its explosion-protected construction makes it suitable for demanding marine, offshore and oil-and-gas applications.
Main Features
- Three-spectrum infrared flame detection
- Long-range hydrocarbon-fire detection
- High resistance to false alarms
- Multiple selectable sensitivity levels
- Automatic optical integrity testing
- Microprocessor-controlled heated optics
- Operates in dirty and adverse weather conditions
- Built-in event logging with date and time
- Fire, fault and auxiliary relay outputs
- Optional 0–20 mA output with HART communication
- SIL 2-capable versions available
- Aluminium and 316 stainless-steel housings
- Suitable for indoor and outdoor installation
- Explosion-proof hazardous-area construction
Automatic Optical Integrity
The detector automatically performs a calibrated optical-path and sensor-performance test. This verifies the detector’s operational condition without requiring routine testing with an external flame-test lamp.
Technical Specifications
| Specification | Details |
|---|---|
| Detection principle | Three-spectrum infrared |
| Nominal operating voltage | 24 VDC |
| Operating-voltage range | 18–30 VDC |
| Power consumption | 4 W minimum without heater |
| Maximum consumption | 17 W at 30 VDC with heater and EOL resistor |
| Analogue output | Optional isolated 0–20 mA |
| Communication | Optional HART |
| Relay rating | 5 A at 30 VDC |
| Standard operating temperature | –40°C to +75°C |
| Extended hazardous rating | Up to –55°C to +125°C, model dependent |
| Humidity | 0–95% RH; withstands short periods of condensation |
| Protection rating | IP66/IP67 |
| Enclosure options | Painted copper-free aluminium or 316 stainless steel |
| Field of view | 90° horizontal × 75° vertical |
| Cable entry | ¾-inch NPT or M25, version dependent |
| Functional-safety option | SIL 2 capable |
| Standard | EN 54-10 |
| ATEX certificate | DEMKO 01 ATEX 130204X |
| IECEx certificate | IECEx ULD 06.0017X |
| Marine approval | DNV and US Coast Guard options |
Detection Performance Examples
Performance depends on the selected sensitivity, fuel, flame size and environmental conditions.
| Fuel/fire example | Maximum stated distance |
|---|---|
| n-Heptane fire | Up to approximately 80.7 m |
| Diesel fire | Up to approximately 53.3 m |
| Methane plume | Up to approximately 38.1 m |
| Propane plume | Up to approximately 38.1 m |
| Methanol fire | Up to approximately 45.7 m |
| Jet fuel fire | Up to approximately 71.6 m |
Typical Applications
- LNG and LPG carriers
- Oil and chemical tankers
- FPSOs and offshore platforms
- Refineries and petrochemical plants
- Compressor stations
- Turbine enclosures
- Loading racks and fuel terminals
- Gas-processing facilities
- Aircraft hangars
- Engine and machinery spaces
Available Configurations
- Painted aluminium housing
- 316 stainless-steel housing
- Relay and analogue-output versions
- HART-enabled versions
- SIL 2-certified configurations
- X33AF PL models for AutroSafe PowerLoop systems
- Standard and extended-temperature versions
The exact part number must be selected according to housing material, cable entry, certification, output and communication requirements.
