3-5m Automatic Body Infrared PIR Motion Sensor Detector Switch For LED light E
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
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.
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
3-5m Automatic Body Infrared PIR Motion Sensor Detector Switch For LED light E
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Motion Sensor DC 5V 24V Light Switch Movement Detector Automatic PIR Sen E
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
4 Modes Outdoor Solar Alarm 129dB Motion Sensor With Dog Barking Gunshot Sounds
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
AC 85-265V Replacement Motion Infrared Sensor Switch For Outdoor 180° Detection
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Smart Wi-Fi Water Leak Detector Kit, 4 Sensors & Base Station, App Alerts, Slim
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
3-5m Automatic Body Infrared PIR Motion Sensor Detector Switch For LED light F
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
1Pc USB Port Detector Infrared PIR Motion Sensor Switch For Led Light Strip bb
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
12-24V 24.125GHz Human Inductive Motion Microwave Radar Motion Tracking Sensor
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
8 9 10 11 12 Inch Lamp Shade Harp Holder, Adjustable Lamp Harp Kit, Fit Both St
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Solar Driveway Alarm Wireless outside 1800Ft Range, Outdoor Motion Sensor & Dete
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Alarm Contact Sensor Riser (2Nd Gen) | Elevates Sensor for Crown Molding & Trim
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Motorcycle Millimeter Wave Radar Warning Blind Spot Monitoring Warning Safety
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Wifi Intelligent Intrusion Infrared Detection Alarm Motion Sensor Induction Home
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
2 Pack Water Leak Detectors for Home, 100dB Water Sensor Alarm Flood Leakage ...
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Water Alarm Leak Detector,Water Leak Detectors for Home with App Alerts,Water...
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
High / Low Water Level Sensor Detector Alarm 120 dB Red Strobe Siren, Adjusta...
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Motion Sensor Light Switch, Occupancy & Vacancy Model Motion Activated Wall Swit
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Safe House Invisible Pulsed Beam Infrared Photorelay / Alarm 49-307 Radio Shack
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
4 Mode Solar Powered Alarm With Motion Sensor 129dB 13 Sounds For Outdoor Use
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
AC 85-265V Maintenance Motion Infrared Sensor Switch For Outdoor 180° Detection
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Ultrapro Personal Security Window and Door Alarm, 2 Pack, DIY Protection, Burgla
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
OC-55 Normally Closed Alarm Security Rolling Gate Magnetic Reed Switch
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Sensor Switch CMRB 6 High Bay, Passive Infrared Fixture Mount Occupancy Sensor,
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Wireless Motion Detector Sensor LED Light Alarm 500ft Range
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Pack Of 2 Globe Wi-Fi Smart Motion Detector No Hub Required Battery Operated
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Reliance Controls Corporation THP108 PowerBACK! Mains Return Alarm
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
ADC-S2000-T Temperature Sensor ALARM.COM Wireless Smart New
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Honeywell 5870API-WH Wireless Indoor Asset Protection Sensor - New Open Box
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
100Pcs Security Tags Lanyards Wire Loop (4", Black), Polypropylene Cable Loop
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
50Pcs Security Tags Lanyards Wire Loop (10", White), Steel Wire Cable Loop
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
100Pcs Security Tags Lanyards Wire Loop (7", Black), Steel Wire Cable Loop
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
100Pcs Security Tags Lanyards Wire Loop (7", White), Steel Wire Cable Loop
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
peq Door & Window Sensor 2 Pack
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Inovonics 900MHz Supervised Wireless FA Transmitter - FA210W Door/Window
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Resideo 5800PIR-COM Wireless Indoor PIR Motion Sensor, Battery Operated, White
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Sontax Door And Window Alarm !!4 Pack!!
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Honeywell Home DT8035 DUAL TEC Motion Sensor, 40' 56' Range
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Eve Motion Wireless Smart Home Detector, Apple HomeKit, Water Resistant, White
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
4Pack In-Wall PIR Motion Sensor Light Switch, Single Pole Motion Activated Switc
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
GE Security Interlogix 60-452-10-319.5 Pendant Panic Device Open Box White SOS
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Electronic Watchdog (ED-20) No Power Cord
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Leak Sensor Probe 2-Pack (Sense Hub Required, Accessory to Home Monitoring Syst
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Treewell PIR Motion Detector TMD180C, Wired Indoor Motion Sensor, Beige
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
20Pcs Security Tags Lanyards Wire Loop (14", White), Steel Wire Cable Loop
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
50Pcs Security Tags Lanyards Wire Loop (8", Black), Steel Wire Cable Loop
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
20Pcs Security Tags Lanyards Wire Loop (12", Black), Steel Wire Cable Loop
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
50Pcs Security Tags Lanyards Wire Loop (7", White), Steel Wire Cable Loop
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
50Pcs Security Tags Lanyards Wire Loop (14", Black), Steel Wire Cable Loop
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.