Ported Coaxial Cable Sensor (or leaky cable) has been around for a very long time(1) and was quite reliable even before the advent of computerized DSP to help with detection.
(1)I think you could buy them commercially at least as early as the 70's
Buried coax and fiber detection systems tend to rank in the bottom 1/3rd of overall reliability (just above the systems that try to detect fence movement and tension changes).
In fact, I rarely hear of new deployments considering these technologies (though I'm sure there are plenty of them, as the companies are still in business).
Comments
Ported Coaxial Cable Sensor (or leaky cable) has been around for a very long time(1) and was quite reliable even before the advent of computerized DSP to help with detection.
(1)I think you could buy them commercially at least as early as the 70's
Buried coax and fiber detection systems tend to rank in the bottom 1/3rd of overall reliability (just above the systems that try to detect fence movement and tension changes).
In fact, I rarely hear of new deployments considering these technologies (though I'm sure there are plenty of them, as the companies are still in business).