Patent ID: 7709812

Claim:
A disposable device for monitoring cumulative exposure to ultraviolet radiation (UVR) over several successive periods of time; said device comprising: a single base having an upper surface and a lower surface; a single area of UVR sensitive material applied to the upper surface of the base; said UVR sensitive material formulated to undergo a visible change upon exposure to UVR; a protective covering secured to the upper surface of the base and applied over the single area of UVR sensitive material; wherein the protective covering comprises: a plurality of coplanar segments disposed laterally adjacent each other, each segment being disposed over one of a plurality of discrete regions of said single area of UVR sensitive material and being successively individually removable from the protective covering to expose successive regions of the single area of UVR sensitive material to UVR; and an exposure scale disposed on the base; whereby the change in the UVR sensitive material in each discrete region is comparable with the scale to determine a level of exposure to UVR.