Low-Cost Temperature Control from 160 K to Ambient Temperature Using Liquid Nitrogen Evaporation

摘要

The need for constant temperature regulation can be found in a variety of analytidal, physical, biological, and organic chemistry experiments. In general, thermal control above room temperature is made by heating a liquid or a metal block via passing current through a resistance circuit controlling a heater (1-2). However, the thermal control below room temperature uses different approaches, ranging from the traditional commercial or lab-designed flow systems (3), in which fresh liquid from a reservoir flows through a cell housing, to the flow of precooled nitrogen gas though a block housing.