Motion Sensor DC 5V 24V Light Switch Movement Detector Automatic PIR Sen A
$10.11
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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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3-5m Automatic Body Infrared PIR Motion Sensor Detector Switch For LED light A
$10.11
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1Pc USB Port Detector Infrared PIR Motion Sensor Switch For Led Light Strip
$10.91
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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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24.125GHz Human Inductive Motion Microwave Radar Sensor For Automatic Door
$17.14
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20m Single Beam Alarm Photoelectric Infrared Detector Alarm Home Security A
$14.91
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SALE Wireless RF Door Entry with Receiver Lighting Control By Defiant with Batteries
$11.16$15.95
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YoLink's YS7903-UC Water Leak Kit: Hub + 4x Leak Sensor NEW
$59.99
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4X GE Audible Window/Door ALARM - Battery Operated 2 Pcs (8 Total)
$25.00
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NEW Solar Motion Sensor Alarm With Strobe Light For Yard Security
$21.54
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SALE Solar Power Motion Sensor Loud Sound Light Alarm Dog Barking Gunshots Repeller
$31.63$51.63
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LM393 Sound Sensor Module High Sensitivity Microphone Detection 5 Pack Arduino
$16.85
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SimpliSafe ES3 (SSES3) door/window wireless Entry Sensor - Tested And Working
$7.99
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Maestro Motion Sensor Switch MS-OPS2-WH White Occupancy Vacancy Energy Saving
$66.33
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Automatic Light Sensor Control Switch DC8-50V Photocell Light Switch Replacement
$12.18
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Solar Motion Sensor Alarm, 3pc Siren System fits Home Farm & Warehouse Security
$152.52
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SimpliSafe Motion Sensor Gen 2 - Compatible with Gen 3 Base ~ New Open Box
$20.00
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Presence Sensor FP300 Wireless 5-In-1 Motion Sensor with Mmwave, PIR, Light, Tem
$90.99
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SALE New 315mhz Infrared Motion Sensor Home Garage Alert Security System
$18.14$20.38
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GE 45115 Wireless Magnetic Window Alarms 2 Pack
$18.99
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SALE New Automatic Light Sensor Control Switch DC8-50V Photocell Light Switch Parts
$11.80$13.26
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Smart Vibration Sensor with 110Db Alarm,Zigbee Hub Required,Adjustable Sensitivi
$36.99
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Zigbee Vibration Sensor, Wireless Mini Glass Break Detector for Alarm System, Ho
$34.99
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SALE Guardline Extra Receiver Wireless Driveway Alarm 500 Ft 915MHz New
$49.99$64.97
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New Winland Waterbug Water Detection Sensor W-S-S WB-800 and all EnviroAlert.
$50.00
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Automatic Water Leak Detector with Sensors and Shut-off Valve
$78.59
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TOPGREENER Motion Sensor Switch Black 1 Pack
$44.99
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SALE Driveway Alarm- 1/2 Mile Long Range Wireless Driveway Alarm Outdoor Weather R...
$56.50$59.47
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Wireless Radar Motion Detector Sensor – Add-On Accessory Only, No Receiver – 1/2
$195.17
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NEW Steinel Dual HF COM1 Presence Motion Detector Sensor Ceiling 002978
$99.00
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Aeotec SmartThings Multipurpose Sensor - Zigbee - Door/Window & Temperature S...
$55.32
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Contractor Select CMR Series 360° Small Motion Dual Technology Standard Range Ce
$60.11
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Lot of 3 GE Window or Door Alarm 56789 120dB New Factory Sealed
$12.00
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GOLDHILL 10.5" Outdoor Semi Flush Mount 2 Pack Flush, Bronze with Gold
$85.35
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YoLink DIY Automatic Water Leak Detection & ShutOff Starter Kit, Valve Operat...
$518.96
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Kidde Smart Water Leak and Freeze Detector WiFi Alexa Google 60WLDR-W Lot Of 2
$29.99
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500Ft Range Security Sensors & Alarms, 2 Count
$46.63
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Ultimate Flood Defense: 3-Pack Water Leak Sensors with Real-Time Notifications
$91.99
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SALE 20M One Beam Infrared Sensor Detector Alarm Photoelectric Infrared Laser Sensor
$14.23$16.55
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SALE Microwave Radar Human Motion Detector Sensor Module for Supermarkets Atms
$18.23$21.20
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SALE 5-24V USB Port Detector Infrared PIR Motion Sensor Switch For Led Light Strip ss
$10.41$12.11
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SALE Automatic Light Sensor Control Switch DC 8V-50V Photocell Light Switch Repair
$11.63$13.52
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SALE New 45° Infrared Motion Sensor Home Garage Alert Security System
$18.12$20.59
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Automatic Water Leak Detector with Sensors and Shut-off Valve
$78.60
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WiFi Water Leak Detector 100dB Alarm Smart Life Tuya Sensor 65mm/2.6in White
$31.50
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SALE 30cm 5V-24V PIR Infrared Ray Motion Sensor Switch USB/DC LED Detector Switching
$10.56$11.87
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Solar Outdoor Motion Sensor Alarm 2*130db Ultrasonic Siren with 4 Modes Flashing
$19.98
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SALE 3-5m Automatic Body Infrared PIR Motion Sensor Detector Switch For LED light G
$9.55$11.10
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