LANDAUER is the global leader in radon and radiation science and services. We provide long term radon testing for individuals, organizations, and government agencies via our patented Radtrak alpha track radon gas detector. Analysis is performed at our world renowned laboratory in Chicago, IL, using proprietary Track Etch technology that effectively guarantees accurate and reliable test results. Our experience, technology, and expertise make Landauer's Radtrak detector the most trusted radon detection device available today.