A new and distinct cultivar of Verbena plant named \u2018USBENAS18\u2019, characterized by its low and outwardly spreading plant habit; vigorous growth habit; numerous large light purple-colored flowers; and tolerance to Powdery Mildew. Features of the DC vacuum chamber tester are modified to include new op-amp circuitry that provides the ACDC testing functionality of the non-vacuum chamber systems, resulting in an ACDC probe system that can be used in a vacuum environment. The piston is received in an aperture defined by the cylinder. The camera of a mobile phone photographs the label at a close-up distance, with the lens of the camera regrouping the split image elements of all the color bars to reconstruct the product code that will be displayed on the screen of the mobile phone.