Durridge is a leading manufacturer of research-grade radon and thoron detection monitors. Since 1997, Durridge has offered world-class radon detection solutions for nuclear researchers, geologists, and environmental safety professionals worldwide. Our RAD8 and RAD7 continuous radon and thoron gas monitors feature precise measurement far exceeding EPA accuracy standards. Durridge also provides a wide range of accessories for the RAD8 and RAD7 allowing for water and soil testing, as well as Capture software for performing sophisticated radon data analysis.