Fuel dispenser input device tamper detection arrangement

A multi-layer tamper detection arrangement for use with an input device, said input device comprising tamper-response electronics and memory, said multi-layer sensor comprising:

• a flexible circuit assembly configured for connection to said input device, said flexible circuit assembly comprising:
• an outer layer comprising a first tamper-responsive conductor circuit;
• and
• a first inner layer disposed beneath said outer layer, said first inner layer comprising at least one switch, a removal detection circuit, and a foreign conductor detection circuit;
• wherein said at least one switch is configured to close said removal detection circuit when said at least one switch is actuated;
• wherein said foreign conductor detection circuit is normally open;
• and
• wherein said first tamper-responsive conductor circuit, said removal detection circuit, and said foreign conductor detection circuit are configured for electrical communication with said tamper-response electronics of said input device.

A method of detecting unauthorized removal of or tampering with an input device, said input device comprising tamper-response electronics and memory, said method comprising the steps of:

• providing a flexible circuit assembly coupled with said input device, said flexible circuit assembly comprising:
• an outer layer comprising a first tamper-responsive conductor circuit;
• and
• a first inner layer disposed between said input device and said outer layer, said first inner layer comprising at least one switch, a removal detection circuit, and a foreign conductor detection circuit, wherein said at least one switch is operatively connected to said removal detection circuit, and wherein said foreign conductor detection circuit is normally open;
• wherein said first tamper-responsive conductor circuit, said removal detection circuit, and said foreign conductor detection circuit are in electrical communication with said tamper-response electronics of said input device;
• monitoring electrical characteristics of said first tamper-responsive conductive circuit, said removal detection circuit, and said foreign conductor detection circuit;
• and
• producing a tamper response at said tamper response electronics when a change in electrical characteristics of one of said first tamper-responsive conductive circuit, said removal detection circuit, and said foreign conductor detection circuit is detected.