Nice info there mika, but obviously "we are not in the same laboritory on this science experiment."
Those "climate control" units work on the thermostat system, cutting in and out with hysterisis differential and delays designed for air temp control. They are fine for egg incubators, fridges and air conditioning systems. They are fine for the back-yarder home brewer on a budget wanting a bling display!
Also, who wants a hand held imersion element welded into a steel liquid heating vessel?
The controller I have found described in this thread, connected to a permanent immersion element, is designed to enable precision control of liquid heating. It you want bling, then get a digital thermometer from eBay for $10.