Part of Danaher Corp., X-Ray Optical Systems, Inc. (doing business as XOS) is an American company located in East Greenbush, NY, that manufactures equipment for analytical devices that measure sulfur content in petroleum. On March 02, 2012 Danaher Corp. acquired X-Ray Optical Systems, Inc.\nThe company says this about itself: XOS is a global leading provider of advanced optics and OEM sub-systems that greatly improve the measurement speed, precision, and sensitivity of X-ray analytical instrumentation. XOS' polycapillary optics can be used in many applications, including plating thickness, forensics, cultural heritage, and elemental mapping. fleX-Beam, our latest compact X-ray generator solution, combines a low-powered X-ray source and precisely aligned polycapillary optic to deliver a bright X-ray beam for advanced material analysis. The innovative optic mounting and alignment design enables an easy X-ray tube and/or optic replacement, making it a user-friendly tool for both OEMs and end users.