| 摘要 |
The device includes a casing (10) with two parts (10A,1B) and a wiring input section (16). A photoelectric cassette (18) is mounted on pillars (14). A photoelectric cell (11) is mounted behind a window (20) in the casing which allows light in. An adjustment screw (22) is externally mounted to the casing. A Light Emitting Diode (23) is mounted behind the screw. The screw is attached to a translucent rod (25). The rod couples light via a chamber to the photoelectric cell, so that varying the screw depth varies the photoelectric cell sensitivity, adjusting the level of light at which switching occurs. |
