Automation Systems Interconnect's light curtains
These light curtains feature 94 cross beams, optical synchronism and no need of external control boxes. In addition, they are available with integrated solid state and relay outputs. The light curtains have a switching distance of more than 12 ft, operate on 12 - 24 Vdc and come with both a supply indicator and an output indicator. They are protected from short circuit and polarity reversal and offer a sensitivity adjustment.