Vesda LaserPLUS

The KIDDE Orion HSSD

NFPA Building Codes

OSHA Fire Safety Information

OSHA Fire Safety Advisor
1.0a Software

Automatic Fire Alarm
Association (AFAA)

Air Sampling Systems 
High Sensitivity Smoke Detection

Air sampling systems are designed to detect fire in high value applications, where conventional fire detectors simply fail to provide sufficiently rapid response. In applications where down time is a critical factor, high sensitivity smoke detection systems provide early warning fire detection up to 1000 times more sensitive than conventional spot type fire detectors. This provides rapid fire detection allowing facility personnel to address potential problems before they result in costly down time.

Vesda LaserPLUS Highly Sensitive, Highly Reliable  Aspirating Detection

The LaserPLUS detector provides a highly sensitive, highly reliable form of aspirating detection. It detects fire at the earliest possible stage and reliably measures very low to extremely high concentrations of smoke. The Cheetah control panel can be configured to communicate directly with one or more LaserPLUS detectors via a High Level Interface (HLI). The High Level Interface (HLI) provides bi-directional and fully supervised communication between the Cheetah and the LaserPLUS. This configuration provides an integrated approach to system operation by providing each LaserPLUS detector the same functionality as a Cheetah photo, ion, or heat detector.

The Display Module provides a real-time indication of the status of a VESDA LaserPLUS Detector. It has a 20-segment vertical bar graph, a two-digit numerical display, an audible sounder, and clear alarm and fault indicators. It also has four pushbuttons to control the detector and mode of the display.

The Programmer Module allows modification of the settings of a VESDA LaserPLUS system. Using an intuitive menu system, commissioning and maintenance of the system is convenient and efficient. The programmer is the access tool to the individual parameters on the LaserPLUS detectors and displays while also facilitating the configuration and maintenance of many detectors connected by VESDAnet.

Data Sheets (PDF Format):

• VESDA LaserPLUS Detector Unit
• High Level Interface
• Scanner
• VESDA LaserPLUS Display Module

The VESDA system uses a Xenon tube as the light source to bounce light off fire byproducts in the detection chamber Vesda Air Sampling System. The VESDA air sampling fire detection system detects the invisible byproducts of materials as they degrade during the pre-combustion stages of an incipient fire. And, by actively and continuously sampling air, the system operates independently of air movements.

In operation air samples are continuously drawn from the monitored environment, typically through a sampling pipe network with the aid of a high efficiency aspirator. On the way to the fire detector the air samples pass through a filter assembly to screen out large airborne dust particles. Once inside the air sampling detector the samples are exposed to a high-intensity and broad-spectrum light source. The incident light scattered from smoke particles in the air sample passes through a series of optical components to a solid state light receiver. The light is converted to an electronic signal and passed to the control system.

At the control module the signal is processed and presented on an analog bar graph to visually indicate the level of smoke present in the monitored area. Depending upon smoke levels and the preprogrammed alarm levels, the appropriate output signals are generated.

The first of the three staged alarm levels (ALERT) may simply indicate that the system has detected something out of the ordinary that should be investigated. The second level (ACTION) indicates that a potential fire exists and that emergency procedures should begin. The third level (FIRE) signifies an actual fire condition.