Hello!
I'm currently an intern at the Vilnius University Laser Research Center and I must develop a small dimension (aprox~40mmx60mmx5mm) sample heating/cooling system with a temperature range of -2ºC up to 150ºC for my setup. I was thinking of a single peltier element to achieve this temperature range, but, as I see from your answers, that might be a difficult and even impossible solution to my problem.
What made me think about a peltier device is the fact that I need something not too bulky and that can have a hole in its center (for sample backlighting purposes). Do you know any other solutions that may help me? (probably two different setups, one for heating - using resistors - and other for cooling?)
Thank you very much!