A Leakwise system consists of a controller and one or more sensors (also called detectors). The ID-227 sensor has a high frequency transmitter mounted on a Wave Rider buoy that maintains its position precisely at the liquid/air interface, despite fluctuations in the liquid level and waves. The ID227 operates in an unlimited fluctuating liquid levels, and is controlled by the analog PS-220 Controller, which has two field-adjustable alarm points:
• Low oil alarm – Detection of a first predefined layer thickness of hydrocarbons
The ID-227 can detect as little as 0.3 mm (0.01 in) oil on water reliably, repeatedly, and without false alarms. It can also monitor on-line changes in oil layer thickness up to 20 mm (0.79 in). The ID-227 is connected to the Controller with a floating cable. The Controller relays are used for local and remote alarms and control. Continuous built-in diagnostics monitor sensor operation. An appropriate mooring should be designed and implemented according to actual site conditions.