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Intrusion Detecting Set AN/PSR-1A This set is capable of detecting human footsteps, moving vehicles, low flying aircraft. This set comes with 4 seismometer\'s each one has a range of 30 yards in any direction for footsteps and 100 yards for vehicles. The control set may be placed up to one mile from the seismometer\'s. It requires 6 D cell batteries (not included) new batteries should last 3 months of continuous duty. It requires field telephone wire (not included) Please look at all of the pictures as they are part of the Discription.
This set is used but I tested it and it works very well. It looks good for its age. I purchased these from the Department of Energy (DOE) Shipping is free if you have any questions please ask before offerding. Thanks for looking!
Originally these came in a canvas carrying bag and had headsets this one does not. Just thought I should point it out.
What you\'ll get is
1 Control Set
4 Seismometer\'s
1 Ground Rod
The pictures are of the set you\'ll receive.
What you\'ll need to use it
6 D cell batteries ( not included )
Field Wire 2- conductor or other equivalent 18 gage commercial wire suitable for field telephone use ( not included )
