Disclosed is a power device, such as a power MOSFET device and a method for fabricating same. A processor includes a plurality of RF switches and at least one hybrid, for selectively generating a plurality of signals including sums and differences of signals from said elements. The gas detector converts gas-level outputs produced by the high-temp exothermic detector unit and the low-temp exothermic detector unit responsive to the hydrogen concentration and humidity into electric signals, and outputs them after computing electrically levels of the hydrogen concentration and humidity contained in a gas introduced into the two detector units through a gas intake opening. A user may photograph a body and detect the acquired thermal imaging data frame under the visual reference of the reference image.