ADT SiXCTA Wireless Door Window and Window Sensor Contact Alarm Sensor
$18.95
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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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AC 85-265V Motion Infrared Sensor Switch For House Garden 180° Detection Range
$12.63
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3 Packs Motion Sensor Light , PIR Sensor Detection ,Ceiling or Wall Mount 8248
$11.19
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Water Leakage Sensor Alarm For Home Security
$11.44
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low voltage Ceiling PIR Motion Sensor Light Switch Time Delay Light Switchh
$20.00
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Wireless Driveway Alert System - 400 ft Motion Detector for Home Security
$48.95
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Recessed NC Door Contacts with Magnetic Switch for Security Systems, 5 Pack
$17.99
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Recessed Magnetic Reed Switch Door Window Contact Sensor - 5 Pack
$17.99
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Ring Alarm Motion Detector (1st Gen)
$15.97
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Recessed Magnetic Reed Switch Security Sensors for Doors and Windows - 4 Pack
$14.99
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Recessed Magnetic Reed Switch NC/NO for Door Window Security - Set of 5
$38.99
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SALE 1pcs New SENSE-WARE UV/IR detector T-229/4P
$2,471.94$2,658.00
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Motion Sensor DC 5V 24V Light Switch Movement Detector Automatic PIR Sen E
$10.33
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SALE Digital Hygrometer Thermometer WiFi Smart Temperature Humidity Sensor Meter
$18.95$22.03
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Vintage MONACOR Motion Sensor Wooden Box
$21.00
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GoveeLife Upgraded Water Leak Detector 1s with Smart Gateway 1s (1+3 Pack)
$17.99
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10ft-23ft Infrared Motion Sensor Home Garage Alert Security System
$19.35
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5 Sets of 3/4" Flush Mounted Magnetic Door Alarm Switch Sensors NC Type
$15.99
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Wired Recessed Door Sensor Magnetic Switch for Alarm System Access Control
$34.99
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3 Sets White Iron Door Recessed Wired Security Window Alarm Sensors
$15.99
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MC-33C Recessed Magnetic Reed Switch Alarm Sensor - 6 Sets
$31.99
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MC-33C Recessed Magnetic Reed Switch Alarm Sensor - 2 Sets
$14.99
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Extra Wireless Weather Resistant Motion Sensor - 1/2 Mile Range & 50FT Detection
$33.95
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Design House Jelly Jar Ceiling Light, 4.83 inches Diameter, Oil-Rubbed Bronze
$29.99
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SALE Hubbell Replacement Lens for End of Aisle High Bay Occupancy Sensor HBRLEA
$5.69$5.99
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PQ125A Underground Water Leak Detector Indoor Wall & Ground Water Pipe Leak
$1,078.94
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SALE Universal USB Port Detector PIR Motion Sensor Switch For Led Light Strip
$10.74$12.35
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3-12M 360 Degree Ceiling Occupancy Sensor Motion Sensor Light High4376
$15.24
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12V 24V PIR Motion Sensor IR Infrared Human Induction Time Delay Relay 2330
$14.99
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Magnetic Reed Switch 10 Pack, Wired Recessed Door/Window Alarm Sensors Brown
$63.99
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RC-36 NC+NO Recessed Wired Magnetic Window/Door Alarm Sensor - 4 Sets
$32.99
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3-Way PIR Motion Sensor Light Switch, 4-Pack, Adjustable Sensitivity and Timer
$93.99
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💧 LaCrosse Technology Water Detector Sensor TX60U-IT Leak Alert Alarm Home Smar
$24.99
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3-5m Automatic Body Infrared PIR Motion Sensor Detector Switch For LED light D
$10.33
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MC-33C Recessed Magnetic Reed Switch Alarm Sensor - Normally Closed (2 Sets)
$15.99
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Voice Recordable PIR Motion Sensor Detector MP3 Player Speech Music Sound
$46.21
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5 Sets of RC-33 NC Magnetic Door Switches for Security Alarm Systems
$16.99
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5 Sets RC-36 NC/NO Recessed Wired Magnetic Window/Door Contact Sensors Brown
$43.99
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SimpliSafe Door Window Magnetic Entry Sensor ES3 (Gen 3) 4-Pack - Brand New
$38.00
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2-Pack Wired Recessed Security Window/Door Contact Sensors, NC Magnetic Switch
$13.99
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Sensorworx SWX‑202‑1 Ceiling OCC Sensor Low Voltage Large Motion NEW Box Damaged
$34.97
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MC-33C Recessed Window Door Contact Sensor Alarm - 5 Sets
$27.99
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Philips Keypad Controlled Door Alarm (Indoor) (LRM3120K/27) & Window Alarm NEW
$29.00
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Chamberlain MyQ Garage Door Sensor MYQ-G0202
$20.00
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Recessed Wired Magnetic Door Switch RC-33 NC Security Sensor Alarm (5 Sets)
$15.99
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SALE Motion Sensor Light Switch, PIR Infrared, 2-Pack
$49.59$61.99
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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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