Hach Ultra HYT products have led the industry in in situ particle monitoring (ispm) for almost 20 years. From the early days of pioneering the field, the HYT range of in in situ particle sensors for Etch, Implant and CVD tools have matured to truly outstanding vacuum process monitoring solutions. All over the world, semiconductor manufacturing relies upon the unsurpassed performance, reliability and continual innovation of HYT solutions.