An optical polarizer includes a supporting element and an optical polarizing film supported by the supporting element. The devise has a vault having a cavity, a closed bottom and an open top. A cap with outer radius R3 is disposed outside the nozzle with outer radius R2. A cylindrical body, having an offset through-hole to receive a sensor assembly, is disposed within the sensor port cup for rotational movement about the central longitudinal axis between an operational position where the offset through-hole is aligned and coincident with the port, and a servicing position where the offset through-hole is displaced relative to the port. The processor may receive, via the interface, the plurality of bids and the plurality of mobile advertisements from the revenue generator. The stripping aid promotes the regeneration of the absorbent by stripping.