Abstract: This invention relates to a device for measuring the ultraviolet radiation in the UV-A and/or UV-B range with detector means for said ranges, switching means for considering the skin sensitivity, electronic means for evaluating the signals derived from the detector, means for displaying the intensity and/or the dose of the radiation and second switching means for selecting one of different quartz lamps in said ranges. This device is in particular adapted for digitally measuring the dose of harmful erythem effective UV-B radiation or the dose of therapeutic healing UV-A radiation. This invention further relates to a method for producing and calibrating said devices, in particular the shunts contained in said second switching means which enables to select different quartz lamps with different line intensities.

Abstract: An apparatus for enabling the tolerance of the skin of individual persons to ultra-violet radiation to be determined, including a source of UV radiation and a mask having apertures for allowing UV radiation of different intensities to be applied to the skin of a person being tested.