» 1 to 16 Zone Water Leak Detection System: The GWD Multizone 16

The GWD range of MultiZone liquid leak detection alarms is the latestdevelopment form Aqualeak, and utilises everything we've learnt in  25 years of designing, manufacturing and installing of Leak Detection Systems. 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 GWD16. 

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 BMS, or can be used to shut water supplies via solenoid valves. The GWD System can also be supplied with optional Individual Zone Signalling relays which would provide appropriate zone control/alarms and Mains Power fault relay.