photoelectric controlの例文

• Furthermore, before the invention of photoelectric controls, a single switch or clock could control all the lights in an entire district.
• A variety of upgrades and innovations were applied to the light in the early twentieth century, including an experimental photoelectric control for the fog signal installed in 1936.
• A variation of this technology is the'differential switching or dead-band'photoelectric control which has multiple illuminances it switches from so as not to disturb occupants as much.