» 1 to 8 Zone Water Leak Detection System: The GWD Multizone 8

The GWD range of MultiZone Water Detection Systems is the latest development of over 25 years on the Aqualeak experience in designing, manufacturing and installing of Water Leakage Detection Alarms. The GWD continues to offer a 'package' approach to providing numerous unique alarm and remote signalling features as standard. It continues to operate on the proven Aqualeak principle of utilising an AC field sensing signal to detect water in order to avoid the inherent electrolysis, oxidization and erosion problems common to DC systems. The GWD System also continues to monitor from the full range of Aqualeak linear leak detection sensor cables, sensor tape or from multiple water detection sensor probes, sensor pads, overflow/level sensors etc.

The GWD Units are available in three cabinet sizes: 1 to 8, 1 to 16 and 1 to 32 Zone cabinets. The system is based on a 'four zone master PCB' with a 'four zone slave'. This enables the GWD System to be configured for the requisite number of zone required by a specific project, or to be manufactured to the nearest multiple of four. The unit illustrated on the left is a GWD8. 

The GWD system operates from standard single phase mains supply and can be supplied with optional Battery Backup Pack for 10 hours operation during a mains power failure. Adjustment Pots are provided for each zone to enable on-site adjustment of detection sensitivity. The System is provided with zone time-out alarm interrogation on water being detected, and on going out of alarm, to minimise false alarms. Each Zone continues to provide active water sensing throughout any Water Detected Alarm and does not go off-line or require any manual operator reset to reactivate the System. 

The System is provided with two ‘Common Alarm' no-volt changeover relays which operate on water being detected by any zone. These can be linked to the Aqualeak Remote Repeater Panel, the Aqualeak Autodial Unit, or be linked into a computer based Building Management system, or can be used to shut water supplies via matched solenoid valves, or switch on sump pumps/drainage systems etc. The GWD System can also be supplied with optional Individual Zone Signalling which would provide appropriate zone alarms via individual no-volt changeover relays and Mains Power fault signalling via a further no-volt changeover relay.