1 PCS Linear Garage Door Opener Sensors Beam Kit For HAE00002 LSO50 LDO33
$27.36
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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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Mini Siren Motion and Temperature Sensor Alarm System Wifi New
$18.99
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Wireless Driveway Alarm, Outdoor Weatherproof Motion Sensor & Detector with 600f
$33.81
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Craftersmark Outdoor Ceiling Light with Motion Sensor, Flush 1 Pack, 10.5 in
$61.35
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Souphran Plug-In Wireless Motion Activated Light Control No Wiring Adjustable
$64.73
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Water Leak Sensor Flood Detector Probe Alarm For Home
$11.42
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MC-31 Wired Surface-Mounted NC Magnetic Door Window Contact Sensor Alarm Reed Sw
$12.99
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MC-31 Wired Surface-Mounted NC Magnetic Door Window Contact Sensor Alarm Reed Sw
$14.99
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MC-31 Wired Surface-Mounted NC Magnetic Door Window Contact Sensor Alarm Reed Sw
$14.99
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WiFi Water Leak Detector 3 Pack - 100dB Alarm, SMS & Email Alerts, 200M Range
$71.99
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Smart Water Leak Detector Kit - WiFi Sensor Alarm, SMS/APP Alerts, 3 Sensors, Ho
$71.99
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Automatic Water Leak Detector with Sensors and Shut-off Valve
$78.59
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Dome Z-Wave Plus Water Detector DMWS1
$59.99
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Tuya Smart WiFi Infrared Sensor APP Control Home Security PIR Motion Detector US
$14.99
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Ring Alarm Contact Sensor 1st Gen (New - Factory Sealed)
$19.99
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SALE 3-5m Automatic Body Infrared PIR Motion Sensor Detector Switch For LED light A
$10.33$10.99
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Radio Shack Wireless Key-Lock Door/Window Alarm (Model 49-118 / 4900118) New
$4.99
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4x SimpliSafe Entry Sensors Door/Window Alarm Sensors Lot w/ Boxes
$20.25
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SALE Door Alarms for Kids Safety - 95dB Wireless Burglar Alarm
$31.99$39.99
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ElimiTron Dual Sensor S8800 Arrowhead Security Motion Detection Device Old Stock
$44.95
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AC100-240V Motion Sensor Switch PIR Infrared Auto On/Off for LED Lights White cc
$15.99
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Lot of 3 Wired Dual-Tech PIR + Microwave Motion Detectors Motion Sensor Security
$29.00
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WattStopper RS-150BA-N-W PIR Vacancy Sensor Night Light Amber LED White 120V
$20.00
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SALE 10 Sets Pack of Wired Surface Mounted Alarm Magnetic Contacts Door Window Reed
$21.42$22.99
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Centralite Water Leak Sensor - Monitors Your Whole Home for Leaks - Detects
$13.99
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ADT Blue Door Window Sensor (SSH1R0-29) - 4 Pack
$48.00
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Aqara Water Leak Sensor 3 Pack Zigbee Wireless Leak Detector Alarm Flood Sensor
$95.98
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ADT Blue Motion Sensor Model SSM1R0-29 *Lot Of 2 " New
$37.00
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Defiant 270-degree black replacement motion sensor
$14.70
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SALE Reliable Weatherproof Driveway Alert System
$110.99$184.99
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Reliable Outdoor Motion Detector - Large Property Coverage
$109.99
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Weatherproof Driveway Security System
$83.99
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SALE Mighty Mule Wireless Driveway Alarm System - FM231 (New Sealed)
$44.95$50.99
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20 Sets Wired Magnetic Door Window Alarm Contact Sensor - Security Reed Switch
$49.99
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20 Sets Magnetic Window Door Sensor Contacts - Surface-Mounted Reed Switch Alarm
$39.99
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NWT Honeywell Lyric Wi-Fi Water Leak & Freeze Detector – White
$95.00
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SALE set of 3 GOVEE Wireless Water Leak Detector H5054 (NO GATEWAY)
$28.00$29.39
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Water Guard Sensing Cable Extension (6.5 Ft/2 M)
$34.80
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Seco-Larm Enforcer Curtain Sensors - 22.5 In. - Black (E-9622-4B25)
$29.00
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Safety Technology International, Inc. EM1212DOC, System Record Documents Enclosu
$152.18
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Theben 2039100 Presence Detector / Motion Sensor KNX | Smart Home Automation
$145.00
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TECKNET WiFi Water Leak Detectors 2pk APP Alarm Sound Sensor
$68.99
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SALE Wireless Caregiver Pager Motion Sensor Alarm Indoor Room Bed Alarms and Fall ...
$39.59$43.99
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Security Light Motion Sensor 10000mAh 2 Pack
$107.99
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Motion Security Light 2 Pack 10000mAh 3 Modes
$107.99
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White Glassbreak Sensor with 20ft Range & App Alerts for Gen 3 Security
$75.49
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SALE Wireless Driveway Alarm System - 1/2 Mile Range
$77.59$96.99
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Entry Sensor Pack of 4 - White, Wireless, Battery, Smart Home Compatible
$104.49
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