The Mini-Sentry trip alarm uses a readily available, inexpensive .22 caliber concrete gun load or .22 blank, and is constructed of machined brass, steel and stainless. It can be used to alarm large areas with a trip wire, gates, pastures, meadows, doors, vehicles, equipment, products and more. The Mini –Sentry can be installed with a zip tie, wire or screws. A distinct advantage to a trip wire with a gun shot repeat is the trespasser knows that you are aware of his presence – a huge deterrent.
