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photoelectric

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First Alert BRK 7010B Hardwired Smoke Detector with Photoelectric Sensor and Battery Backup , White $21.45 from $17.09	First Alert Slim Photoelectric Smoke Alarm with 10-Year Sealed Battery, PR710, White $27.99 from $11.65
SITERLINK Smoke Detectors 10-Year Battery Operated, Photoelectric Sensor Smoke Alarm with Test-Silence Button, UL Listed Fire Alarms Smoke Detectors with LED Lights for Home, GS526A (6 Pack) from $70.99	Taiss/Indoor Wall Mounted Photoelectric Beam Sensor 12-240VDC 24-240VAC Retroreflective photoelectric Sensor Switch Proximity Switch Induction Distance 5M BEN5M from $24.99
2 Pack Light Control Sensor Button Switch,2 Pack Photoelectric Switch,120V AC Outdoor Hard-Wired Post Eye Light Control, Dusk to Dawn Sensor,with Automatic Illumination Detection Circuit from $15.49 ($7.74 / Count)	Kidde Hardwired Smoke Detector with 9-Volt Battery Backup, Photoelectric Smoke Alarm, Battery Included $22.82 from $21.99
Taiss/1 Pair photoelectric Switch 0-20M Through-Beam Reflection Optical Photoelectric Beam Sensor NPN NO photoelectric Sensor Switch 6-36V Proximity Switch with Infrared Ray Beam E3F-20DNL-Z-12MM from $27.99	EDISHINE Outdoor Post Light Accessories, Dusk to Dawn Sensor, Photoelectric Switch for Outdoor Pole Light, Automatic On/Off, Waterproof, UL Listed from $15.99
FIRST ALERT Battery Powered BRK SC7010BV Hardwired Talking Photoelectric Smoke and Carbon Monoxide (CO) Detector , White $46.12 from $24.97	Flutesan 3 Pieces Dusk to Dawn Sensor for Outdoor Lighting 120-220V Photoelectric Switch Photocell Light Sensor Hardwired Post Eye Light Control Most Outdoor Lamp Fixtures Bulbs from $13.41