The extended temperature ranges of the Espec BTX-475 Temperature and Humidity Benchtop Chamber make testing at extreme conditions possible without buying a larger, stand-alone chamber. The BTX-475 can cycle temperatures at rates up to 5°C/minute without requiring liquid nitrogen. Significant test time can be saved, as well as creating added thermal stress on your samples. To demonstrate performance, ESPEC uses the international standard IEC 60068 3-5 measured at the supply air. Temperature cycles are run from hot to cold extremes, and the middle 80% of the transition is timed to determine performance. Your actual cycling results will vary depending on methodology, including the start and end temperatures, and the amount of samples loaded.