The EFESTO4/KEEPER light curtains are an opto-electronic type 4 system with multi beams (Electro-Sensitive Protective Equipment) for the protection of the body, to prevent accidents caused by dangerous machinery, in accordance with international safety standards. The wide range of models gives employees on every field of industrial automation the protection of fingers, hand, arm, and the whole body. The NS/NI light curtains are opto-electronic system with multi beams for measurement and automation. The NS series detects the presence, the form and the position of an object. The NI series detects objects with high speed of movement.