Air is drawn into the VLP through a network of air sampling pipes by a high efficiency aspirator. Each inlet pipe has an airflow sensor that monitors airflow changes in the pipes. Air is exhausted from the VLP and may be vented back into the protected zone.
Inside the VLP, a sample of air is passed into the laser detection chamber. Ultra-fine air filtration provides very clean air to protect the optical surfaces inside the detector from contamination.
The detection chamber uses a stable Class 1 laser light source and carefully positioned sensors to achieve the optimum response to a vast range of smoke types.
The status of the detector, and all alarm, service and fault events, are transmitted to displays and external systems via VESDAnet.
Key features include:
- Wide sensitivity range (0.005 – 20% obscuration/m and 0.0015 – 6% obscuration/ft)
- Laser-based smoke detection covering 2000 m2 or 20,000 sq. ft
- Four programmable alarm thresholds
- AutoLearn feature
- Four inlet pipes
- Airflow supervisor per sampling pipe
- Easy to replace air filter
- 7 programmable relays
- Modular design