| 摘要 |
PROBLEM TO BE SOLVED: To prevent slippage between a set sensitivity in manufacture and a detection sensitivity after field installation. SOLUTION: In the photoelectric smoke sensor, an optical base cover 20 is put over an optical base 20 mounted with a light emitting element 3 and a light receiving element 4 to form a smoke detection part S, and the smoke detection part S includes an installation part 11 for sensitivity setting member. The optical base cover 20 has an insert hole 22 communicating with the installation part 11. COPYRIGHT: (C)2007,JPO&INPIT
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