A method of providing an extruded tire tread with anti-static properties. The other probe that is the other reception element or transmission element is disposed between the transmission element and the reception element. The encapsulated device further includes a diffusion layer that is on the organic optoelectronic device and that diffusion layer covers exposed areas of the organic optoelectronic device. The housing includes a front cover pivotally movable between open and closed configurations. By comparing the second signal with a reference signal, whether the currently read area is blank area or non-blank area can be discriminated.