A pair of Came Wireless DBC01 surface-mounted "cordless" photocells with synchronised mono-directional infrared beam. Range: 10m / 32.8 fit (1 receiver + 1 transmitter without batteries).
Pair of Came DIR Wired Safety Photocells.
Pair of Came DELTA-I/DELTA-E flush/surface-mounted photocells complete with casing. Range: 20m / 65.62 ft.
A pair of Came DIRZ 2 Metal Covers for DIR Wired Safety Photocell Sensors.