Leakwise ID-223 sensors detect the presence of thin layers of hydrocarbons on the surface of the water in many locations where oil leaks can happen, in wet and in dry sumps. In addition, the sensors monitor the buildup of the detected oil and provide leak trends. Early spill detection and monitoring is done at:
Other common applications include detecting and monitoring hydrocarbon leaks and spills in canals, retention ponds and boiler condensate tanks. In addition, the ID-223 monitors wastewater treatment plant discharge to ensure regulatory compliance and alerts plant operators of any upsets in the treatment process.
Leakwise system consists of a controller and one or more sensors.
The ID-223 sensor has a high-frequency transmitter mounted on a float built in a guiding cage. The floating sensor maintains its position precisely at the liquid/air interface, despite fluctuations in liquid level. The ID-223 is controlled by the analog PS-220 Controller, which has two field-adjustable alarm points:
The ID-223 can detect as little as 0.3 mm (0.01 in) oil on water reliably, repeatedly and without false alarms. It also monitors online changes in oil layer thickness up to 20 mm (0.8 in) and report it through a 4-20 mA output signal from the controller. Controller relays are used for local and remote alarms and control. Continuous built-in diagnostics monitor sensor operation. The SLC-220 digital controller handles up to four sensors. A stilling tube (available as an optional accessory) is recommended for ID-223 installations where lateral water velocity exceeds 30 cm/sec (11.8 in/sec).
Leakwise ID-223 has three sub-models for different maximum water fluctuation capabilities:
Leakwise sensors use a high-frequency Electromagnetic Absorption technique. Each floating sensor houses high-frequency electromagnetic energy transmitting and receiving antennas that continuously monitor the liquid surface. Since water absorbs more electromagnetic energy than hydrocarbons, changes in the absorption rate of water indicate the presence or buildup of hydrocarbons. Leakwise sensors are used for detection and monitoring the buildup of separated or emulsified non-soluble hydrocarbons on water and other aqueous solutions, and indicate a dry sump condition. No other oil sheen monitoring system does this.