Principles

The principal of operation is that temperature dependant black body emissions occur for all materials. These emissions range through the infra red spectrum  to visible light. Both the wavelength and level of peak energy emission are related to temperature.

The Series 5000 detectors are designed to detect the changes in these emissions  that occur when a hot body enters the field of view of the detector.

By the use of both optical filtering and electronic analysis of the various parameters the system is blind to visible light from the sun or local luminaires, whilst being able to detect relatively low temperature material moving through the field of view.

Applications

The 5000 system is most suited to situations where material or equipment that has a fire initiating potential is being moved. For example, the system can detect and prevent a FIRE from being imported into a protected area, as in the case of a burning road or rail vehicle entering a tunnel or building.
In addition the system can monitor for materials in transit, that have yet not reached a flame condition, but have sufficient energy to initiate a fire upon arrival at their destination.
A typical example is in the coal feed systems on power stations where coal on the 'out field stack' may very well smoulder with little adverse effect for long periods of time. However, if imported to the power station it may have devastating  effects on conveyor systems, hoppers, blending plants, etc.

• Conveyors


• Escalators


• Drying Lines


• Rail Systems


• Food Processing


• Road Tunnels


• Production Lines


• Baggage Handling

The System

Each 5000 system comprises of three primary elements. A sensor unit, a control unit and an air supply. The latter is required such that a positive air pressure is maintained at the sensor unit optical lens aperture, thus preventing dust settling on the lens. This air purging is essential in dusty environments such as coal conveyors, and is recommended in even relatively clean applications. A series 5000 air purge blower and filter unit is employed when an 'on site' clean air supply is not available.
The sensor unit is located above or beside the materials transit path (conveyor, roadway, etc.) by means of the adjustable mounting bracket and aligned such that the monitored hazard passes through the sensor's field of view. The distance and angle of the sensor determine the width of the monitored path.

Typically conveyor widths of 1.6 to 4.2 m can be monitored with a sensor mounted 1.0 to 1.5 m above the conveyor at an angle of 30° to 60°.
A local control unit is mounted such as to provide ready access for operational and maintenance purpose.

The unit provides:-

• Detection , Fault monitoring & indication.



• Operator controls and adjustments.



• Alarm, Trip & Fault output contacts.