Abstract: An anti-theft product display system utilizes a command module and a plurality of sensor satellites arranged in a daisy chain configuration. The command module and sensor satellites operate with microprocessors and can be programmed to perform several operating functions. Each sensor satellite can receive up to eight sensors without requiring shunts or terminators for the unused sensor jacks. A data retention system is incorporated into each sensor satellite to prevent the loss of data in the event of power failure to the command module.

Abstract: An alarm system for securing an air powered hand tool having a threaded female air intake coupling. The alarm sensor has a secured and an unsecured state which is detectable by an alarm system. The alarm sensor includes an sensor housing and an elongate cord containing a first and second conductor extending from the sensor housing for electrical communication with the alarm system. A male coupling is rotatably mounted to the sensor housing and cooperatively threaded to engage the threaded female coupling. A switch is carried by the male coupling and connected between the first and second conductors. The switch is responsive to the relative position of the male coupling with respect to the threaded female coupling. By unscrewing the male coupling from the threaded female coupling, the alarm sensor is placed in the unsecured state.