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