Each thermocouple was fixed to a Z-positioning micrometer
stage and pressed down against the peltier surface until the thermocouple
reading became steady-state. The two thermocouples
used were type-K with bare wire diameters of 80 mm (250 mm
including PFA insulation) and 200 mm (500 mm including PTFE
insulation), see Table 1 and *manufacturer lab facility.