SALE Motion Sensor Light Switch, PIR Infrared, 2-Pack
$49.59$61.99
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Sensors & Motion Detectors
Motion, door/window and glass-break sensors are the trip-wires of a security system. Check what hub or panel they pair with (many are brand-specific and won't mix), wired vs wireless, and battery life for wireless units. For motion sensors, pet-immune designs avoid false alarms. Buying spare or used sensors is fine — just confirm the protocol and that they're compatible with your system.
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SALE 
Solar Motion Alarm,Outdoor Siren Detector with Flashing Light,Ip65 Waterproof,Re
$51.99
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Solar Outdoor Motion Sensor Alarm - Dog Barking & Gunshot Sound, Support Recordi
$34.99
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Automatic Water Leak Detector with Sensors and Shut-off Valve
$72.82
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Gebildet 3 Sets White Magnetic Switch Wiring NO/NC Recessed Door white NO
$15.86
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Mdt SCN-BWM63T.02 Motion Sensor TS63 Temperature 2x Sensor Keys White Knx
$162.72
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(4) ADEMCO 5850 Wireless Glass Break Detector White Battery Powered Indoor
$77.99
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1/2PCS Solar Motion Sensor Alarm with Remote Control, 130Db Sound & Light Alarm
$31.78
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SALE Eve Motion Wireless Motion Sensor SEALED Apple Home Privacy Home Security C
$55.99$79.99
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SALE Eve Motion Wireless Motion Sensor SEALED Apple Home Privacy Home Security C
$55.99$79.99
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SALE Eve Motion Wireless Motion Sensor SEALED Apple Home Privacy Home Security C
$55.99$79.99
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Automatic Water Leak Detector with Sensors and Shut-off Valve
$77.80
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Ring Alarm Wireless Home Security Alarm System + Keypad & Sensors - 1st Gen
$42.99
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Qxmh Solar Outdoor Motion Sensor Alarm Dog Barkinggunshot Sound 129Db Loud
$83.84
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Bunker Hill Security Door / Window Entry Alarm Pack of 2 Item 94983 New Sealed
$5.99
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SALE DC9‑24V Waterproof Adjustable Infrared Sensor Human Body Induction Sensor Switch
$20.02$27.80
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SALE Ultrasonic Liquid Level Sensor Non-Contact DS1603NF V1.0 for Household
$33.94$47.14
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Ring Glass Break Sensor Z-Wave White Real-Time Notifications Simple Setup@A
$54.00
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1~2Pack Solar Motion Sensor Gunshot Dog Sound Alarm Ultrasonic Animal Deterrent
$31.51
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Wired Door Contact Sensor NO Surface Mount Magnetic Reed Switch Brown 5 Pcs
$19.91
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SALE 5Pcs Magnetic Proximity Sensor High Frequency Approach Sensor 2 Wire Normally
$37.69$52.35
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SALE Sensor Switch Street Light Control Adjustable Rain Anti‑Thunder Protection 220V
$16.31$22.65
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QWORK MC-31 Wired Surface-Mounted NC Magnetic Door Window MC-31, White
$14.33
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$62.98
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Automatic Motion Sensor Light Switch Set for Bathrooms & Garages - 2-Pack
$151.99
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Peasur 7 inch LED Ceiling Light, 7in-1 Pack, White
$14.52
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Wireless Vibration Alarm Security Anti-Theft 110dB Loud Remote Control Bike M...
$44.67
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SALE Leviton DOS05-1LZ LED/CFL Motion Sensor Wall Mount White Ivory Almond
$15.00$18.65
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Vintage General Electric Zonar Burglar Alarm 8250-003 Brown Safety Security
$23.99
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SALE Ring Alarm 5-Piece Security Kit - White (4K11S7-0EN0) 1st Gen - Brand New
$60.00$80.00
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Honeywell FlexGuard FG-1625 Glassbreak Detector Hardwired Security Sensor New
$30.00
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6-Pack PIR Motion Sensor Light Switch - No Neutral Wire, Listed, Matte White
$108.99
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1-2 Alarma solar con luz y sonido y sensor de movimiento sirena de seguridad
$31.78
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Greengate Cooper Dual Tech Low Voltage Occupancy Sensor OAWC-DT-120W NEW
$22.99
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Smartthings Multipurpose Sensor - Zigbee - Door/Window & Temperature Sensor, Pe
$51.77
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SALE Outdoor Waterproof Wired Motion Detector Dual PIR Sensor Pet Immunity Security
$40.95$56.87
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SALE 12V DC PIR Infrared Body Motion Sensor Automatic Detector Control Smart Switch
$16.87$23.43
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Solar Outdoor Motion Sensor Alarm, Dog Barking&Gunshot Sound,130Db Loud Noise Ma
$53.99
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SALE Intelligent PIR Infrared Automatic Sensor Motion Detector Keyhole Lock Light 4
$12.07$16.76
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SALE 2 Sets Magnetic Reed Switch DC12 to 24V NC Wired Door Window Sensor for Home
$19.25$21.88
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Solar Motion Sensor Alarm with Custom Voice Upload - 120Db Loud Noise Maker & St
$48.99
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Bright Solar Motion Sensor Alarm 129dB Siren Strobe Light Remote USB Backup
$59.37
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Watt Stopper WA-300-W Passive Infrared Automatic Wall Switch 120- 277V
$60.00
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Automatic Water Leak Detector with Sensors and Shut-off Valve
$78.59
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SALE 10 Sets Magnetic Reed Switch DC100V NC Recessed Wired Door Window Sensor Switch
$24.91$28.31
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Dakota Alert Long Range Wireless Driveway Motion Detector - DCMA-4000 One Mile A
$99.61
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SALE DC12V 24V Motion Sensor Switch Hand Sweep IR Sensor Switch ON/OFF DIY LED LiY-N8
$5.46$5.75
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Solar Motion Sensor Alarm with Dog Bark Sound and Strobe Light
$42.39
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