SALE Solar-Powered Strobe Light with Alarm System
$35.19$43.99
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.
SALE 
SALE Zigbee Water Leak Sensor Flood Leakage Detector Linkage Alarm Sensor
$22.39$27.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Aqara Hub Gateway Smart HUB Home Apple Homekit ZHWG11LM
$29.95
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Occupancy Sensor Light Switch - Easy Install
$71.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
BESTOONE Driveway Alarm System, Wireless Motion Sensor, 2 Alarms, 4 Detectors
$55.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
BESTOONE Wireless Driveway Alarm Motion Sensor System
$78.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Motion Sensor Lights 2 Pack 10000mAh 3 Modes
$107.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Smart Motion Detector with Color LED Alerts - Ideal for Homes & Retail Spaces
$45.96
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Safety Technology International, Inc. EM1212DOC, System Record Documents Enclosu
$152.18
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
GoveeLife Smart Water Leak Detector | Free Shipping
$92.95
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Bosch PROFESSIONAL SERIES PIR Motion Detector | ISC-PPR1-W16 (NIB)
$29.00
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Solar Alarm LED Light Solar Strobe Light Wireless Motion Sensor Detector Outdoor
$20.60
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Honeywell Home Smart Room Sensor White for T9 & T10 Pro RCHTSENSOR
$25.00
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
New SimpliSafe SD3 Smoke Detector Alarm SSSD3 White Gen3
$39.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Driveway Alarms Wireless outside Weatherproof - Motion Sensor Alarms System Moti
$41.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Driveway Alarm- 1/2 Mile Long Range Wireless Driveway Alarm Outdoor Weather Resi
$66.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
$34.00
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
ECOELER 3Way Motion Sensor Light Switch in Wall Sensor for Led/Incandescent Bulb
$17.00
View on eBay
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
$36.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
ADT+ Self Setup Door / Window Sensor White (SSH5R0-29)
$15.00
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Ring Z-Wave range extender. 110 volt.
$23.88
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
4-Pack, Dusk to Dawn/Day Night Sensor, Photoelectric Switch, Photo Cell Sensor,
$58.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
E-936-S45RRGQ Retro Reflective Photoelectric Beam Sensor, 45Ft (14M) Sensing Ran
$124.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
E-931-S35RRQ Enforcer Indoor/Outdoor Wall Mounted Photoelectric Beam Sensor with
$92.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Zigbee Vibration Sensor 3 Pack with 110Db Alarm, Zigbee Hub Required,Adjustable
$95.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Climate Sensor (3-Pack) Sense Hub Required
$75.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
DEDC 6pcs Mini LED Spot Lights, 1W 5V 3000K Under warm white, black-2
$36.50
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Occupancy & Vacancy Sensor Switch
$21.59$26.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
New Techko Glass Vibration Breakage Sensor Security Alarm Model S086C
$9.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Driveway Alarm- 1/2 Mile Long Range Wireless Driveway Alarm Outdoor Weather Resi
$73.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Simplisafe Entry Sensor (Pack of 4) - Window and Door Protection - Compatible wi
$91.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Govee Life Water Leak Detector 5 Pack w Smart Gateway H5059 H5044 New
$30.00
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
12 Inch LED Flush Mount Ceiling Light Fixture, 12 Inch-White, Daylight White
$39.09
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
2Pack LED Flush Mount Ceiling Light Fixture, 7Inch 15W, 7Inch-2pack, White
$27.78
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
$115.00
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
PRO SERIES PWA2 110 dB 9v Battery Operated Water Alarm Sensor Leak Detection
$12.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Professional Water Leak Detector - Dual Probes, Noise Reduction, High Sensitivit
$75.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Enforcer E-931CS22RRCQ Through-Beam Photoelectric Sensor
$45.00
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Qualirey Solar Motion Alarm 4 Pack: 129dB, Strobe, Animal Deterrent
$200.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
ECOELER PIR Motion Sensor Ceiling Light, 3CCT Selectable 2 - Pack, White
$35.35
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Wall-Mountable Water Alarm with Loud 110 dB Sound for Alerting Homeowners
$26.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Smart PIR Motion Sensors: WiFi Detector with App Notification White
$29.50
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
AROWHEAD S2000 PHOTOELECTRIC SYSTEM
$29.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Abode Mini Door / Window Sensor Lot of 15
$350.00
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
110V 220V 105dB 0‑350℃ Intelligent Over High And Low Temperature Alarm Sensor
$98.80
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
110V 220V 105dB 0‑350℃ Intelligent Over High And Low Temperature Alarm Sensor
$98.84
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
105dB Intelligent Over High And Low Temperature And Humidity Alarm Limit Sensor
$106.84
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
105dB Intelligent Over High And Low Temperature And Humidity Alarm Limit Sensor
$106.84
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.