129Db Solar Motion Sensor Alarm with Strobe Light - 16 Pack Outdoor Security
$239.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
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.
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Luvkczc 12" Retro Semi Flush Mount Ceiling Light,Black Light Black
$50.28
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
FULEN Motion Sensor Ceiling Light Fixture, Cordless Closet 1 Pack, White
$35.11
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
AC180-240V 50/60Hz Auto On/Off Light Voice Sound Sensor Switch Time Delay
$3.14
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
New Matte White Motion Sensor Switch, PIR Infrared, Single Pole, Ground Wire
$50.63
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE New Winland Waterbug Water Detection Sensor Unsupervised W-S-U WB-200 350 800
$22.00$23.00
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Weather-Resistant Motion Detector with Extensive Indoor/Outdoor Coverage
$37.77$41.97
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE 180-Degree Motion Sensor with Adjustable Sensitivity for Outdoor Security Lights
$20.67$22.97
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Handrail Bracket Stainless Steel Brackets Wall Support Easy Installation
$18.93
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Versatile 3 Pack of 8” Motion Sensor LED Closet Lights - 3 Color Temperatures
$16.17$26.95
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Kangaroo Home Security Motion Sensor - White
$7.48
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Biaungdo 6 Pcs Brown Wired Magnetic Door Window Contact Reed Switch, Surface-Mou
$54.39
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Biaungdo 4 Pcs Brown Wired Magnetic Door Window Contact Reed Switch, Surface-Mou
$54.39
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Solar Sound & Light Alarm Motion Sensor 110 Decibels Siren Sound Alert & 6LED...
$25.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Lot of 2 AVTECH SOFTEWARE INC. FLOOD External Sensor
$50.00
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Moose Products MPI-38 Self Contained Siren Security Speaker Alarm
$39.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Highly Sensitive 2 Pack Water Leak Detectors - Prevent Water Damage Effectively
$22.79$23.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Recessed Door Contacts NC Security Alarm Window Sensors With Magnetic Reed Switc
$45.62
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Wireless Door Window Alarm Sensor Anti Theft 108 DB Easy Installation Security A
$13.83
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Smart Water Leak Sensor 120dB Alarm Overflow Alert For Home Kitchen Excellent
$13.78
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Flume Smart Home Water Monitor Leak Detector – WiFi Real-Time Tracking Alerts
$75.00
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE New 10 x RC-33 NC Wired Door Contact Sensor Alarm Magnet Reed Switch 100V
$12.07$14.03
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
eufy Home Alarm System Motion Sensor 30ft Detect Adjustable Sensor
$20.00
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Smart Water Leak Detector Alarm Flood Sensor for Home Basement
$108.91
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Ring Alarm Contact Sensor 6-Pack - 2Nd Gen | Monitor 6 Doors or Windows | Instan
$124.40
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Emacros Solar Wireless Driveway Alarm System (1/2 Mile Range, 1 Receiver & 4 Sol
$187.92
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Sanjie Door Window Alarms - 5 Pack,125Db,Volume Control,Window Door Open Alarm S
$39.02
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE NEW SimpliSafe Entry Door or Window Sensor PLUS Extra Magnet White 3rd Gen
$9.99$22.97
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Hot Solar Motion Sensor Alarm With Strobe Light For Yard Security
$23.09$24.31
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Decora Motion Sensor In-Wall Switch, Auto-On, 2A, Single Pole, 3-Pack, White DOS
$82.56
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Ademco 4142BLK Terminal Block Kit for Home Security System Black NEW
$10.00$12.49
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
LED Spot Lights Up Indoor Plug in 5W 6000K 13ft Cord Cold White
$38.72
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
BMW 320i Radar Warning Detector 99992162598
$218.89
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
BMW 320i Wireless Radar Detector 99992162597
$181.93
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Honeywell IS3035 PIR Motion Detector - White, 35ft
$19.95
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE NEW Honeywell SiXCTA - Two-Way Wireless Door / Window Sensor ADT Command
$17.95$19.95
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Long Range Motion Sensor System- Dakota Alert MTPR-4000 Wireless Motion Detector
$87.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Wireless Driveway Alarm - 1/2 Mile Range Solar Motion Sensor Detector - Weatherp
$66.59$73.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
PIR Motion Detection Sensor Light Switch Infrared Human Body Induction Parts
$5.07
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Zigbee PIR Motion Sensor 120° Wireless Passive Infrared Detector Home Security c
$20.36
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
ABS 10 x RC-33 NC Wired Door Contact Sensor Alarm Magnet Reed Switch
$9.29
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Hiletgo Outdoor PIR DC 12V Automatic Infrared PIR Motion Sensor Switch for LED F
$12.34
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
New Honeywell DT-6360STC DUAL TEC Motion Sensor
$166.25
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Seco-Larm Enforcer No Touch Request-to-Exit Sensor (SD-927PKC-NEQ) New E13
$58.95$69.35
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
TOPGREENER Motion Sensor Switch 4 Pack White
$80.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Detector de fugas de agua, sensor de alarma de agua, detector de inundaciones pa
$15.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE ADI Pro Request To Exit REX PIR Motion Detector Device Off White New E34
$38.78$45.62
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE 1 Set Wireless Window Door Magnet Alarms Magnetic Sensor Security Burglar Alarm
$15.49$30.98
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.