Abstract: A monitoring, tracking or security system includes a tamper detection system or employs a tamper detection method. A tamper detection system can include a member having a first surface and a second surface, the second surface being attached to a piece of equipment. The sensing element is disposed on the first surface of the member. The housing is attached to the first surface. A circuit is electrically coupled to the sensing element. The circuit provides an alarm signal in response to the sensing element being distorted.

Abstract: A security system for monitoring movement of persons in a secured area including set openings which includes area and opening monitors, tag units and an alarm system. The tag unit has special end clamp members which securely clamp an attachment strap to a housing for attaching the unit to a person. Tampering with the connection creates an alarm state. The tag unit includes a dual transmitter continuously transmitting very low frequency (VLF) signal and transmitting a very high frequency (VHF or UHF) signal only if the tag unit is tampered with. The opening monitor includes VLF receivers responsive to a VLF signal and transmitting an alarm signal to an opening alarm system to prevent unauthorized exit. Authorized personnel have a deactivation unit for timed receiver disabling for moving the person through the opening. The UHF transmitter is activated upon unauthorized tampering with the attached tag.