Re: Ultrasonic Sensors

["Stanley Barthfarkle" <sbarth@xxxxxxxxx>]

>>You might also consider seismic sensors.  These can be buried in
>>concentric
>>circles (or whatever shapes you like) around protected areas.  You can
>>define how to respond to an outer circle violation differently from the
>>inner circle with some systems.  These systems are not cheap but they do
>>offer a good deal of flexibility, perhaps more than most surface mounted
>>technologies.  They have the added benefit of being totally invisible and
>>undetectable to the intruder.
>
>
> You have absolutely NO fucking idea about those devices.


Sure he does... he has Google. LOL.