Vehicle Loop Detectors for Automatic Gates and Doors

Loop detectors are installed to operate an automatic gate. Usually installed within the premises to open and close gates automatically by detecting the presents of a vehicle. The loop consists of several loops of wire which is installed on the driveway. When vehicles pass over the loop a relay is triggered. The sensitivity can be easily adjusted to suit all vehicles.
Loop detectors can be installed to automatically open the gate for all vehicles going out of an area.

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loop installation guide

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Loop Installation Guide 1. The detector should be installed in a waterproof housing as close to the loop as possible. 2. The loop and feeder should be made from insulated copper wire with a minimum cross-sectional area of  1.5mm2 . The feeder should be twisted with at least 20 turns per metre. Joints in the wire are not  recommended and must be soldered and made waterproof. Faulty joints could lead to incorrect operation of  the detector. Feeders which may pick up electrical noise should use screened cable, with the screen earthed  at the detector. 3. The loop should be either square or rectangular in shape with a minimum distance of 1 metre between  opposite sides. Normally 3 turns of wire are used in the loop. Large loops with a circumference of greater than  10 metres should use 2 turns while small loops with a circumference of less than 6 metres should use 4 turns.  When two loops are used in close proximity to each...
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Automatic boom barrier gate system

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