SALE AC 85-265V Replacement Motion Infrared Sensor Switch For Outdoor 180° Detection
$11.92$13.39
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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 
SALE PIR Motion Sensor Switch Auto-Sensing On/Off AC100-240V for Schools & Buildings
$11.92$13.39
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Bed Alarm Caregiver Pager with Wireless Motion Sensor Alarm Indoor Fall Preve...
$38.95
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SALE 328ft Infrared Motion Sensor Home Garage Alert Security System z
$17.93$20.38
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SALE 10 x RC-33 NC Wired Door Contact Sensor Alarm Magnet Reed Switch 100V
$12.45$13.99
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SALE Wi-Fi Water Leak Detector, Smart Water Wireless Sensor with 110dB Adjustable ...
$27.54$28.99
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SALE Water Leak Detector Sensor Alarm: Home Water Flooding Monitor Smart Sink Over...
$20.89$21.99
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SALE WD71 Water Leak Detector for WiFi Gateway/Hub, 120dB Adjustable Wireless Wate...
$25.64$26.99
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SALE WiFi Door Sensor Window Detector: Smart Window Contact Sensor, Wireless Magne...
$27.54$28.99
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SALE Smart WiFi Door Sensor: Wireless Window Sensor with App Notification Alert, T...
$27.54$28.99
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Kidde Smart Water Leak and Freeze Detector WiFi Alexa Google 60WLDR-W Lot Of 2
$24.99
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SimpliSafe (MS1000) Original Generation 1 Motion Detector Sensor - BRAND NEW
$12.50
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SimpliSafe Original Generation (ES1000) Door/Window Entry Sensor - BRAND NEW
$2.75
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GE Cync Smart Motion Sensor Wireless Indoor Programmable Hands-Free Lighting
$14.50
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SALE Tuya Smart WiFi Smoke Sensor Fire Protection 85dB Sound Security System ControG0
$26.09$28.99
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QXMH Solar Motion Alarm 2 Pack Dog Bark Gunshot Sound 129dB Red Blue Light
$66.98
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Hosmart Driveway Alarm Sensor 1 Coffee Sensor Only
$54.99
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5 Pack Window & Door Alarms - Wireless Burglar Alert, Easy DIY Home Security
$42.99
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Lot 2 GE Indoor Security Audible Wireless Window Door Alarms Sensor Chime 2Pack
$15.99
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SALE Water Leak Detector Underground Water Pipe Leakage Monitor Digital Disp. F999-L
$266.19$295.77
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STI Rex Plus Barking Watch Dog Motion Sensor Alarm Model ED-50
$69.95
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Honeywell OMV-VX601 Outdoor Visual Alarm Verification Detector
$30.00
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Honeywell OMV-VX601 Outdoor Visual Alarm Verification Detector (#2)
$30.00
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SALE 110V US Plug Industrial Smart Over Temperature Alarm Sensor Machine 752°F
$139.65$147.00
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Solar Warning Alarm Strobe Light Lamp Motion Sensor Waterproof Outdoor Security
$8.99
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PIR Motion Detection Sensor Lamp Switch Infrared Human Body Induction Parts
$5.02
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1 Set 24.125GHz Human Inductive Motion Microwave Radar Sensor For Automatic Door
$17.14
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USB Sensor Switch Infrared Human Body Sensing Switch cabinet Sensing
$6.85
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Automatic Light Sensor Control Switch DC8-50V Photocell Light Switch Accessories
$8.50
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3-5m Automatic Body Infrared PIR Motion Sensor Detector Switch For LED light B
$5.29
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Waterproof LED Solar Powered Alarm Warning Light Strobe Motion Sensor Lamp Alert
$13.37
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1pc Driveway Alarm Infrared Motion Sensor Home Garage Alert Security System
$18.32
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ZigBee PIR Motion Sensor 120° Wireless Infrared Detector Security Burglar Alarm
$20.78
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Body Infrared PIR Motion Sensor Switch For LED Light Strip Automatic DC 12V A
$8.22
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Low-Cost Water Leak Alarm Flood Level Overflow Detector Sensor Home Security
$6.23
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Outdoor Solar Alarm With Motion Sensor 129dB 4 Working Modes Dog Barking Sound
$25.99
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Automatic Infrared PIR Motion Sensor Body Induction Switch Control Replacement
$10.67
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Outdoor Motion Sensor Alarm 2 Pack Replaceable Recording Remote
$54.99
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24GHz CDM324 Microwave Radar Sensor Module Human Motion Detection Switch
$6.85
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Sabre Home Series Shed & Garage Alarm Powerful 120dB Siren Sounds No Wiring
$14.99
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New Solar Motion Sensor Alarm 110db Siren Strobe Light Security Alarm Lamp
$18.51
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2pcs New PIR Motion Sensor Switch infrared wall mount switch AC 110-240V
$12.34
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New Old Stock Sealed Intelectron Motion Detector With Security Light BC 863K NOS
$18.99
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TUYA ZigBee Smart Humidity & Temperature Sensor, WiFi Wireless NOUS E6
$38.35
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AC100-240V Motion Sensor Switch PIR Infrared Auto On/Off for LED Lights White
$15.99
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SALE AC100-240V Motion Sensor Switch PIR Infrared Auto On/Off for LED Lights White zz
$15.03$15.99
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WATT STOPPER CX-105-3 PIR CEILING WALL OCCUPANCY SENSOR, 24VDC, WHITE
$84.00
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Tapo Security Sensor Starter Kit T31 Kit Smart Hub Contact Sensors White
$45.00
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