Heat exchanger 40 in this embodiment is a thermoelectric cooler capable of pumping heat from a cool side to {HEAD ~ a hot side} of {TAIL ~ the device} 
of
Heat exchanger 40 in this embodiment is a thermoelectric cooler capable of pumping heat from a cool side to { HEAD ~ a hot side } of { TAIL ~ the device }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL