Light curtains are presence sensing devices that provide an infrared perimeter around perilous machinery or processes. When an infrared beam is interrupted between the transmitter and receiver, a ...

Light curtain controllers send stop signals to machines that are guarded by light curtains, photoelectric transmitters that project an array of synchronized, parallel infrared light beams to a ...

Blinded by the light? Don't be — these tried-and-tested window covers can help you sleep soundly and even save on utility ...