As per my recent post on bullet proof camera (good ideas) I need to extend my detection perimeter on my farm gate. After considerable Google search It looks like I need a buried (invisible and protected) magnetometer that will turn on gate lights lights and also alert me 700' away inside my house.
A Meier DA-500 looks interesting, using a 100' probe; I need to put the detector at least 60' beyond my gate and have the electronics well inside my fence line. The road outside my gate is gravel so burying a magnetometer probe & cable looks easy.
The AutoAlert AL155 also looks interesting. The problem with both systems is getting an alert to my house from the gate. Wireless to cover the 700' would be nice, but there is a small hill so it is NOT simply line of sight ;(
OTOH, I am looking into the possibility of running Cat5 cable thru an unused plastic water pipe from the house to the gate. If I can do that it opens up a lot of possibilities, including possibly live camera coverage. I would love to be able to see the gate at night and turn on a spotlight (vis X-10?) while I am watching.
Any experience with magnetic vehicle detectors appreciated. Invisible and bulletproof gets big marks ;)
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