Photoelectric Smoke Detector YDS-S01 YDS-S01 Photoelectric Smoke Detector YDS-S01 Photoelectric Smoke Detector (Three-Wire) YDS-S04 Photoelectric Smoke Detector (Four-Wire)
Photoelectric Smoke Detector YSD-22 YSD-22 Conventional Photoelectric Smoke Detector (2-wire) YSD-23 Conventional Photoelectric Smoke Detector (3-wire/DC24V) YSD-24 Conventional Photoelectric Smoke Detector (4-wire/DC24V)
Fixed Temperature Heat Mechanical Fire Alarm Detector YFD YFD-01 Conventional Fixed Heat Detector YFD-02 Conventional Temperature Heat Detector