Described is a correlator for introducing vehicle tires into a conveyor of a vehicle washing system. A pair of concealed hinges mounted, between the casing and the frame, provide pivots about which the frame is rotated. The switching unit switches the at least one IF signal to at least one of the DSG demodulator and the OOB demodulator. The components of the pumping system are designed to be disposable, and the two- or three-chambered canister provides for a highly efficient pumping system that is significantly smaller in size than those previously known. In general, a power-on resetting circuit utilizes the threshold voltage of transistors to generate the reset signal.