How VESDA works?

VESDA works by continuously drawing air into a distributed pipe network via a high-efficiency aspirator. The air sample then passes through a dual-stage filter. The first stage removes dust and dirt from the air sample before it enters the laser detection chamber. The second, ultra-fine stage provides an additional clean-air supply to keep the detector’s optical surfaces free from contamination, ensuring consistent absolute detection and long detector life as well as minimizing nuisance alarms. 

From the filter, the air sample goes through the detection chamber where it is exposed to a laser light source. When smoke is present, light is scattered within the detection chamber and is instantly identified by the highly sensitive receiver system. The signal is then processed and presented via a bar-graph display, alarm threshold indicators and/ or graphic display. VESDA detectors are able to communicate this information to a fire alarm control panel, a software management system, or a building management system via relays or a High Level Interface (HLI).

VESDA Product Range


VESDA Accessories


VESDA very early warning smoke detection solutions provide the earliest possible warning of an impending fire hazard.

VESDA buys time to investigate an alarm and initiate an appropriate response to prevent injury, property damage or business disruption. And because VESDA has the industry’s widest sensitivity range and multi-level alarms, even minute levels of smoke can be detected before a fire has time to escalate.

As the world’s leading ASD brand specified by fire professionals around the world, VESDA is synonymous with reliable, high-performance fire detection.

VESDA Software


VESDA ASPIRE is the latest version of VESDA sampling pipe network design and modeling software. It aids in the design and evaluation process for basic to very complex pipe-network layouts. Key features, such as design wizards, 3-D isometric views, an automated design verification process, and a new AutoBalance capability, ensure that a tailored pipe layout is easily achieved. The Installation Data Pack (IDP) generates a series of reports with parameters, required materials and expected system performance so installation and commissioning engineers receive this information clearly.

Xtralis VSC

The VSC software package can be used to configure, commission and maintain VESDA detectors. The software provides high-level programming flexibility through its on-line and off-line configuration capabilities. Rapid diagnostic abilities, concurrent configuration views, compare/merge functionality, and simultaneous smoke-trend graphing of multiple detectors are other standard features designed to simplify operation and installation setup.

Xtralis VSM4

The VSM software package allows the user to monitor, configure and control a VESDA system from a central location via a VESDAnet communication loop or directly to VESDA detectors. Real-time and historical events for a single detector or multiple networks of detectors can be collected over a local- or wide-area network. The data then can be processed and presented in either report or graphical format — even graphically on site floor plans.


1. When Business Continuity Is Paramount

Is uptime a key business goal? Is service provision critical?

VESDA very early warning smoke detectors provide the earliest  warning of a potential fire which buys time to investigate, intervene and avoid business disruption in addition to damage, downtime and  the cost of a suppression release. Such early warning is critical for:

• Telecommunications facilities

• Server rooms

• Financial data centers

• Utilities

• Power generation facilities

2. When Smoke Is Difficult To Detect

Is high airflow diluting smoke, preventing it from reaching the ceiling so it can be detected? Is the smoke being trapped in ducts, pockets or voids? Is smoke stratifying into a mushroom cloud below a high ceiling, making it difficult to detect?

VESDA sampling points can be placed at the return air grille or in equipment cabinets to detect smoke as it is carried by the air. In large, open spaces, sampling points can be placed where the smoke  goes — often some distance below the ceiling level. Suitable for:

• Server rooms and Telecommunications facilities

• Warehouses

• Atria, theaters

• Convention centers

3. When Maintenance Access Is Difficult

Is the area to be protected inaccessible? Does maintenance on traditional fire detection systems cause disruptions and inconvenience your business?

VESDA detectors can be mounted in accessible locations to enable easy maintenance. Only the sampling pipe network is placed in the inaccessible area. Ideal for:

• Ceiling voids and sub-floor spaces

• Prisons and detention facilities

• Ducts

• Production areas

4. When Unobtrusive Detection Is Required

Is it important to preserve the internal design/decoration of the building? Is vandalism a problem with the current smoke detection system?

A VESDA system can be installed with capillary sampling tubes, which are barely discernible to the human eye. The detectors can be placed in a cupboard or utility area. Great for:

• Modern offices & Prestigious residences

• Heritage buildings & Cathedrals

• Prisons and detention centers

• Art galleries and museums

5. When Evacuation Is a Challenge

Will the building be open to the general public? Will it house people who need extra help during an evacuation? Is evacuation difficult due to crowds or limited exits? What is the business impact of an evacuation?

The very early warning that VESDA systems provide allows the maximum time for evacuation. This is critical for:

• Shopping centers

• Underground tunnels

• Heritage buildings

• Facilities for children and the elderly

6. When Suppression Systems Are Present

Is suppression release costly and disruptive?

The very early warning provided by VESDA systems allows early intervention to prevent suppression releases. The multiple alarm levels of VESDA systems can be used to trigger different responses at different stages of a fire — from controlling air conditioning to initiating a suppression release. Applicable for:

• Communications hubs

• Server rooms

• Command stations

• Switch rooms

7. When Environmental Conditions Are Difficult

Are high background levels or industrial activities present in the area to be protected?

VESDA VLI detector, with its ruggedized enclosure and patented long-life, fail-safe intelligent filter technology, is specifically designed for industrial applications with harsh and difficult environments. The VLI detectors can be installed within the sampling area or remote from the detection area with only the sampling pipes located in the protected area. The sampled air can be filtered, warmed or cooled before reaching the detector. Ideal for:

• Mines

• Water treatment plants

• Manufacturing and processing plants

• Fertilizer plants

• Power generation facilities

• Textile plants

• Timber, pulp and paper plants

• Transportation

Contact us NOW to discuss the best ASD solution for your applications.

Aspirating Smoke Detection System, globally known as Air-sampling Smoke Detection within #NFPA and abbreviated as ASD. 

With more than 20 years’ experience in consultant, design, and supply of ASD across the SEA region, we understand the technology, the applications and the need for an accurate and balanced design of the pipe network to ensure the system performs accurately and to standards requirements. For that reason, we provide a one-stop-ASD-solution of detectors, pipe, fittings and accessories to support our customers.