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Xtralis

 

VLP

®

 

The Xtralis VESDA VLP detector is the central element of the Xtralis VESDA ASD 
product range. Using unique detection principles, the VLP has an alarm sensitivity range 
of 0.0015%–6.25% obscuration/ft (0.005%–20% obscuration/m). The VLP is classed as 
a “Very Early Warning Smoke Detector”.  This means that

 it detects fire at the earliest 

possible stage and reliably measures very low to extremely high concentrations of 
smoke.

How It Works 

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. 

VESDAnet™

Xtralis VESDA detectors and devices communicate across VESDAnet, the Xtralis 
VESDA fault-tolerant communications protocol. The VESDAnet loop provides a robust 
bi-directional communication network between devices, even allowing continued 
operation during single point wiring failures. It also allows for system programming from 
a single location and forms the basis of the modular nature of the Xtralis VESDA system.

AutoLearn™

VLP technology employs unique software tools to ensure optimum operation in many 
differing environments. AutoLearn monitors the ambient environment and sets the most 
appropriate alarm thresholds (Alert, Action, Fire1, Fire2) during the commissioning 

process to allow the earliest possible warning of a potential fire situation with reduced 

nuisance alarms. 

Referencing

Environments that employ air handling systems may be affected by pollution external 
to the controlled environment when “fresh air make up” is added. Referencing by the 
VLP ensures that external pollution does not interfere with the true smoke level being 
detected in the protected environment. The system can safely compensate for this 
transient state and allow continued operation free from such nuisance alarms.

Features

Wide sensitivity range

Laser based smoke detection

configurable alarm l

evels 

High 

efficiency a

spirator

Four inlet pipes 

Airflow 

supervisor per sampling pipe 

Clean air barrier optics protection

Easy to 

replace air fi

lter

7 programmable relays 

VESDAnet™

AutoLearn™

Referencing

Event log

Modular design 

Recessed mounting option

Listings/Approvals

UL

ULC

FM

LPCB

VdS

CFE

ActivFire

AFNOR

VNIIPO

CE - EMC and CPD

EN54-20

Regional approvals listings and regulatory compliance vary between Xtralis 
VESDA product models. Refer to www.xtralis.com for the latest product approvals 
matrix.

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