The single sensor gunshot detection devices use patented concussive wave technology to detect the moment at which a gun is fired and the bullet leaves the chamber. The device is tuned to detect concussion waves from any caliber gun. This new single sensor option is ideally suited for a classroom, conference room or hallway, and it fits many other indoor and outdoor applications such as stairwells, airport security check-in areas, marinas, boat docks, banks, professional offices and more. It is an affordable option for smaller footprint requirements that can easily mount in a corner or against a wall, and it is available in a metal or plastic case and can be powered by 12 volts DC or PoE power