Manufactured by "Pfeiffer Vacuum" of Germany this is a residual gas analyzer (RGA) designed for process control and contamination monitoring in vacuum systems.  RGAs are used in most cases to monitor the quality of the vacuum and detect minute traces of impurities in the low-pressure gas environment. This is a Model HiCube 80 Eco unit, Part #PM025 017 AT, Serial #16208824. Unit has been used once and is in immaculate condition. New $14,000 USD, asking $7,000 USD.