Product Overview
The AutroFlame BG-301 is an interactive triple-infrared flame detector for Autronica Al_Com detection loops. Its three infrared sensors distinguish genuine fires from sunlight, welding activity, hot vibrating objects and other deceptive phenomena.
The detector is suitable for indoor and outdoor marine, offshore and industrial installations. Standard and hazardous-area variants are available.
Main Features
- Three independent infrared sensors
- Strong false-alarm immunity
- Four configurable sensitivity classes
- Four selectable response-time settings
- Automatic electronic addressing
- Built-in short-circuit isolator
- Integrated alarm and fault indication
- Event logging with date and time
- Not easily blinded by oil film
- IP66/IP67 aluminium enclosure
- Two M20 cable glands included
- Standard, Ex ia and Ex ic versions
- EN 54-10 and EN 54-17 certified
Technical Specifications
| Specification | Details |
|---|---|
| Detection principle | Triple infrared |
| Standard operating voltage | 24 VDC |
| Ex ia maximum voltage | 15.75 VDC |
| Average standby current | Approximately 0.35 mA |
| Current with alarm LED | Maximum 3 mA |
| Field of view | ±45° horizontal and vertical |
| Maximum detection range | 30 m or greater |
| Operating temperature | –40°C to +70°C |
| Storage temperature | –40°C to +70°C |
| Humidity | 0–96% RH, non-condensing |
| Protection rating | IP66/IP67 |
| Weight | Approximately 1 kg |
| Housing | Powder-coated aluminium |
| Window material | Sapphire glass |
| Colour | Signal white, RAL 9003 |
| Cable entries | 2 × M20 glands included |
| Cable diameter | 6–12 mm |
| Maximum conductor size | 2.5 mm² |
| System compatibility | AutroSafe version 4.12 or later |
| Standards | EN 54-10 and EN 54-17 |
Sensitivity Classes
| Class | Sensitivity | Minimum detection distance |
|---|---|---|
| Class X | Extra high | 30 m or more |
| Class 1 | High—default | 25 m |
| Class 2 | Medium | 17 m |
| Class 3 | Low | 12 m |
Response-Time Settings
| Setting | Expected alarm time |
|---|---|
| Fast | 3–7 seconds |
| Medium | 7–11 seconds |
| Slow—default | 11–15 seconds |
| Very slow | 15–19 seconds |
The stated response ranges apply to the maker’s specified n-heptane test fire at 15 metres.
Typical Applications
- Ferries and cargo vessels
- Ship machinery rooms
- Offshore platforms
- Oil refineries
- Gas depots and pump stations
- Chemical-production facilities
- Propane and butane filling systems
- Power plants
- Transformer stations
- Industrial warehouses
- Aircraft hangars
- Areas containing welding activity
Important Installation Notes
- The BG-301-EXIA requires an approved Autronica BZ-500 barrier.
- Select the correct standard or Ex test lamp for functional testing.
- Detector positioning should provide an unobstructed view of the protected area.
- Clean the sapphire window periodically to preserve detection performance.
