A PC card assembly including a printed circuit board assembly and an associated two-piece housing made up of a frame-like body and a top cover. The temperature detector sets the level of thereof to a level indicating a low temperature state, detecting that the chip temperature is lower than a second boundary temperature. Polymerase is used to fill in the overhang and synthesize the complement of the 5 overhang of the reporter probe. In particular, a reference used in the comparison is created bearing on a flow rate of the fuel being dispensed through the fuel dispenser. These are read in a preset manner with a bar code reader and inputted into a processor for creation of itemcorresponding location data for the directories.