Safety light curtains protect personnel from injury and machines from damage by creating a sensing screen that guards machine access points and perimeters.  Banner offers intuitive, easy-to-use safety light curtains for a wide variety of safety applications. Type 4 safety light curtains protect personnel from injury and machines from damage by guarding points of operation, access, areas and perimeters. Type 2 safety light curtains are a cost-effective light curtain safety solution for guarding lower-risk applications, where the result of an accident is only a slight injury.