| 摘要 |
A detector unit and system for detecting and signaling the presence of an oil slick on the body of water. An oil sensing assembly consists of a hydrophobic, oleophilic oil sensing material secured to one end of a rod and a magnet secured to the opposite end of the rod, the rod extending into the central bore of a water-tight ballasted shell which houses a battery-powered transmitter. An adjustable magnetic reed switch is positioned in the housing for actuation by the magnet secured to the rod to initiate an output signal from the transmitter. A wire cage surrounds the oil sensing material. An antenna connected to the output of the transmitter extends upwardly from the wire cage. Arms having floats on their terminating ends extend laterally outwardly from the shell, the floats having sufficient flotation capacity to suspend the unit in the water. The oil sensing assembly incorporating the hydrophobic oil sensing material is sufficiently buoyant to float on the surface of the water. When the oil sensing material contacts oil floating on the surface of the water, the assembly sinks into the water, moving the target adjacent the reed switch to close it and initiate an output signal from the transmitter which is received by a corresponding receiver. The receiver activates an audio or visual alarm.
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