Vibration sensor

A vibration sensor to be employed for detecting movement of a physical barrier, the vibration sensor comprising:

• a sensor cover, the sensor cover including a coupling portion for coupling the sensor to a physical barrier at a first orientation, the sensor cover adapted to secure an actuator assembly in at least one predetermined orientation relative to the level horizontal when the sensor is coupled to the physical barrier at said first orientation;
• an actuator assembly comprising:
• a first pair of conductive arcs and a second pair of conductive arcs, each pair of conductive arcs is coupled as a corresponding ends of a switch to a control circuit, the first pair of conductive arcs is positioned substantially parallel to the second pair of conductive arcs;
• and
• a first conductive sphere and a second conductive sphere, the first sphere resting between and engaging each arc from said first pair of conductive arcs to provide an electrical connection between the first pair of conductive arcs and the second sphere resting between and engaging each arc from said second pair of conductive arcs to provide an electrical connection between the second pair of conductive arcs;
• and
• a control circuit coupled to at least each arc of the first pair of conducive arcs and the second pair of conductive arcs, the control circuit indicating an alarm to a sensor output in response to a break in the electrical connection between arcs of a pair of conductive arcs.