A high temperature furnace comprising hot zone insulation having at least one shaped thermocouple assembly port to reduce temperature measurement variability is disclosed. The electric oven further includes a cavity defining a cooking chamber and receiving the wire rack. Each one inputted optical packet is switched over a wavelength having an available transmission resource selected from among wavelengths in one of the KG groups of wavelengths that is matched to the one inputted optical packet by correspondence of attributes of the at least one packet characteristic. In applications where space for a fuel cell system is limited, the integration of the clean\u2014up devices into a common housing provides significant improvements in structural and volumetric efficiency. The shield layers are formed above and below the MIM capacitor, whereby combination of noises with the MIM capacitor can be prevented.