Sentinel Leakage-Current Monitor: An audible warning eliminates the need to watch the actual current level that is continuously displayed on the digital LCD screen. The Kit includes one coaxial cable and battery, two jumpers, and three hose clamps for connections to two or three rail ladders. Brackets on box secure to earth-grounded structure up to 58″ thick such as a transmission tower. A jack on the instrument panel accepts a standard ‘A” two-conductor phone plug to also trigger a truck horn or other external alarm
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