Systems and methods provide current mode logic buffers and interface circuits. The microfluidic device can be fluidically coupled to a switching valve to provide for selective control of fluid flow in the chromatography system. In addition, the splitter reflects the light having a second polarization direction to the face that reflects it toward an exit face. Some terms, predicates and other elements may be eliminated. The tray coupled to the door handle attached to the door may receive excess or residue water or ice dispensed from the dispenser without deterioration of the exterior appearance of the door.