An apparatus for injecting gas into a metallurgical vessel is disclosed. The Tap’s TMS andor TCK terminal can be used as a serial IO communication channel between; an IC and an external controller, between a first and second IC, or between a first and second core circuit within an IC. The first electrode and the second electrode are configured for cooperatively creating therebetween an electric field with an electric field direction substantially parallel to the zinc oxide nano-wires so as to adjust a thickness of the zinc oxide nano-wire layer, thereby moving the second electrode relative to the first electrode. The completions permit temporary or permanent monitoring of changes in reservoir saturation with the use of mobile sourcessensors. This reduces the electrical resistance and parasitic capacitance of the addressing electrodes, enabling the display to provide improved luminance in a displayed image and to operate at higher speeds, providing improved resolution.