Safety light curtains A safety light curtain is a safety device that uses light beams to create a virtual barrier around a hazard and automatically stop dangerous machinery if a person or object passes through it Safety light curtains are used in areas of plants, factories, and other industrial settings where there are hazards to personnel or matrials that require safeguarding. They are optoelectronic safety devices consisting of one transmitter and one receiver. They conform to the safety requirements of type 2 / SIL 1 or type 4 / SIL 3. Typical applications include access prevention or hazardous area monitoring of robot cells and production lines. For food and beverage applications, units with protective tubes and high protection ratings are offered. Safety light curtains with floating blanking can be used to safeguard material feed processes on presses and saws.