View-It ® Ultraviolet Detector features a target aperture of 38mm square. The aperture converts invisible 190-390nm light to a visible orange with a minimum sensitivity of 1mJ/cm2 and a maximum damage threshold of 10J/cm2. Outside dimensions are 132.08mm x 55.88mm. Maximum Sensitivity (nm): 190-390 Image Color: Orange Configuration: Pocket Card Energy (Joules/cm2) 1mJ/cm2-10J/cm2