Description
The VESDA VLF-250 is an advanced very early warning smoke detector designed for small, business-critical environments up to 250 m² (2,690 sq. ft.). It continuously samples air through a pipe network and uses laser-based light scattering technology to detect even the smallest traces of smoke. With intuitive displays and built-in fault diagnostics, the VLF-250 ensures fast response, reliable performance, and simplified serviceability.
Technical Specifications
| Condition |
New/Never Used Surplus |
| Brand |
VESDA (Xtralis) |
| Category |
Fire Safety |
| Part Number |
VLF-250 |
| Subcategory |
Aspirating Smoke Detectors |
| Coverage Area |
Up to 250 m² (2,690 sq. ft.) |
| Detection Method |
Laser-based light scattering |
| Flow Sensing |
Patented ultrasonic airflow monitoring |
| Alarm Threshold Range |
0.025 – 20% obs/m (programmable) |
| Event Log Capacity |
Up to 18,000 events |
| Inputs/Outputs |
3 relay outputs (Fire 1, Action, Fault), RS232, GPI |
| Operating Voltage |
18–30 VDC (nominal 24 VDC) |
| Current Consumption |
220 mA (standby), 295 mA (alarm) |
| Operating Temp |
0°C to 38°C (ambient), -20°C to 60°C (sampled air) |
| Humidity Range |
5% – 95% RH, non-condensing |
| Sampling Pipe |
1 × 25 m or 2 × 15 m branches (max 12 holes) |
| Pipe Sizes |
Metric 25 mm (1.05 in.), IPS 21 mm (¾ in.) |
| IP Rating |
IP30 |
| Dimensions (W×H×D) |
256 × 183 × 92 mm (10.1 × 7.2 × 3.6 in.) |
| Weight |
4.4 lbs (2 kg) |
Information About VLF-250
The VLF-250 is part of the VESDA VLF series of aspirating smoke detectors engineered by Xtralis for compact spaces requiring ultra-sensitive detection. It incorporates patented ultrasonic flow sensing, laser-based absolute smoke detection, and a Smoke Dial™ for immediate visual feedback. Designed for compatibility with pre-engineered pipe networks, it provides versatile alarm threshold settings, AutoLearn™ functions, and event logging for up to 18,000 records. This detector is ideal for protecting small server rooms, telecommunications facilities, and mission-critical control spaces.
Key Features:
- Early Warning Protection: Detects smoke at very low concentrations for areas under 250 m².
- Ultrasonic Flow Sensing: Provides accurate airflow readings, unaffected by temperature or contamination.
- Laser-Based Detection: Ensures precise and stable smoke measurements.
- Smoke Dial™ Display: Enables quick visual recognition of smoke events from a distance.
- AutoLearn™ Functions: Automatically adjusts smoke and airflow thresholds to the environment.
- Event Logging: Stores up to 18,000 time-stamped events for smoke, flow, faults, and detector status.
- Built-In Fault Diagnostics: Instant Fault Finder™ simplifies troubleshooting and maintenance.
- Flexible Pipe Options: Supports metric and American standard pipe sizes for installation versatility.
The VLF-250 delivers the reliability and precision required for protecting small, business-critical environments where downtime or fire damage is not acceptable.
