Landauer, Inc.. The Group's principal activity is the provision of services for monitoring radiation. The services offered are measuring, primarily through optically stimulated luminescent badges worn by the client. The measure is undertaken on dosages of X-ray, gamma radiation and other penetrating ionizing radiations to which the wearer has been exposed. The technology is marketed under the trade name 'Luxel'. The other services of the Group include the detection of radon gas and radiation monitoring. The Group has its operations in Japan, Brazil, China, the United Kingdom and France.