Patent ID: 7902993

Claim:
A system for component movement detection, the system comprising: a payment module; a fuel dispenser, the fuel dispenser adapted to receive the payment module and enclose the payment module at a first position, the first position defined by a fixed position of the payment module relative to the fuel dispenser; and a movement detection device, the movement detection device communicably coupled to the payment module and adapted to: detect a first value at the first position and a second value at a second position of the payment module, the second position different from the first position; transmit the first and second values second to the payment module, the payment module adapted to activate a security measure based upon a difference in the first and second values greater than an adjustable absolute limit; detect a third value at a third position of the payment module, the third position different from the first position, a difference in the first and third values greater than the adjustable absolute limit; match the difference of the first and third values to one of a plurality of stored differential values, each of the differential values corresponding to an authorized movement of the payment module relative to the first position including movement resulting from a servicing of the payment module; and transmit a signal to the payment module to prevent activation of the security measure based on the match.