The Semray UV 4003 from Heraeus Noblelight is a ‘plug-and-play’ UV LED curing unit.┬áIt features one backplane, one data cable and one power cable. Its peak wavelengths are 365, 385 and 395 nm, and its emission window is 75×45 mm. There is a self-regulating cooling system based on CAE simulations. There are replaceable UV channels, so that the entire unit does not have to be discarded when one chip malfunctions. This also permits changing wavelengths. Micro-optics focus the UV radiation, reducing stray light to a minimum. The exit angle is 60 deg. instead of 120 deg.