US Patent 7902993 Detecting component removal

Component removal detection may be accomplished by a variety of systems and techniques. In one embodiment, a system for component movement detection may include a payment module, a fuel dispenser, and a movement detection device. The fuel dispenser may receive the payment module and enclose the payment module at a first position defined by a fixed position of the payment module relative to the fuel dispenser. The movement detection device may be communicably coupled to the payment module and may detect a first value at the first position and a second value at a second position of the payment module, where the second position may be different from the first position. Further, the movement detection device may transmit the second value to the payment module, where the payment module may activate a security measure based upon a difference in the first and second values greater than an adjustable absolute limit.