Hello folks, I am in need of some direction and am searching google and everywhere else, but thought you folks could possibly help. I am trying to find a sensor that will detect when someone walks into or out of a room and will sound a prerecorded message. there are commercial units that use motion sensors when you walk by. What I need is either 1: an optical sensor that would activate when the light is broken, so that it could be mounted in a hallway and would go off when anyone walks through the beam. or 2: a wearable alarm that would sound when someone walks into the room with the alarm on them. If anyone has any idea of suppliers of similar devices please let me know . I am also looking on thomas net but am getting all sorts of other sensors as well and am trying to weed it out. thanks in advance,
Shawn
Shawn