The SGS safety grid system safeguards equipment access points and long-range perimeters. The systems are Type 4 safety devices that create a grid of two, three or four light beams over a protective height of 500, 800, 900 or 1,200 mm. They protect personnel from injury and equipment from damage by detecting a body or torso entering a hazardous area. These multiple beam safety light devices operate in two-piece matched systems. Emitter/receiver systems can safeguard over long distances and are available in models with a range as great as 60 m. Active/passive systems require wiring only on the active side of the deployment.