NEW Ring Alarm Motion Detector (2nd Gen) (1-Pack) - White
$25.00
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.
HomeSafe Wireless Home Security Indoor Motion Sensor - 615PR
$9.90
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Loud-Alert Portable Wireless Durable High-Sensitive Infrared Motion Sensor Alarm
$49.58
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 1s w/ Smart Gateway 1s H5059+H5044 1 +3 Pack
$24.87
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
AC 85-265V Motion Infrared Sensor Switch For Security Lighting 180° Detection
$13.29
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
AC100-240V Motion Sensor Switch Durable Construction for Indoor Lamp Control
$13.29
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
DC USB Body Infrared PIR Motion Sensor Switch Detector Switch For LED Light g
$11.99
View on eBay
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 J
$10.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
328ft Infrared Motion Sensor Home Garage Alert Security System z
$20.59
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Solar Outdoor Alarm with Motion Activated Light
$40.79$50.99
View on eBay
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
$11.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
24.125GHz Human Inductive Motion Microwave Radar Sensor For Automatic Door
$20.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
20m Single Beam Alarm Photoelectric Infrared Detector Alarm Home Security A
$16.39
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Easy To Remove Water Leak Alarm Flood Level Overflow Detector Sensor
$11.19
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
PIR Motion Sensor Wall Switch AC100-240V Professional for Lighting Maintenance
$13.29
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
DC USB Body Infrared PIR Motion Sensor Switch Detector Switch For LED Light k
$11.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Motion Sensor Solar Alarm - 129dB Sound & 6 LEDs Flash Light
$58.39$72.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Solar Outdoor Motion Sensor Alarm with 13 Sounds
$40.79$50.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
White Smart Thermometer Hygrometer Wi-Fi Temperature Humidity Sensor Monitor
$21.39
View on eBay
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 Timer
$10.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
100 MA 10 x RC-33 NC Wired Door Contact Sensor Alarm Magnet Reed Switch
$13.89
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
New 24.125GHz Human Inductive Motion Microwave Radar Sensor For Automatic Door
$20.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
20m Single Beam Alarm Photoelectric Infrared Detector Alarm Home Security C
$16.39
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
ON/OFF Detector Infrared PIR Motion Sensor Switch For Led Light Strip 5-24V
$11.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
2-Pack Dusk to Dawn Photoelectric Sensor Switch, IP65 Waterproof, 110V-240V
$33.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
GE Indoor Security Audible Window/Door Alarms 2-Pack Sensor NEW
$18.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE 20 Sets Wired Magnetic Door Window Alarm Contact Sensors - Security Reed Switche
$41.79$43.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
DMP 1142-B Wireless 2-Button Hold-Up Panic Transmitter Black New
$49.00
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
S.U.R.&R. M10 x 1.0L Inverted Flare Nut - 4 Piece
$34.58
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Long Range Portable Motion Alarm - Essential Security for Outdoor Adventures
$91.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Interlogix 600-9400-IMAG-KIT Image Sensor w/ Daughterboard
$39.67
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Winees WiFi Water Leak Detector, 3 Pack Water Sensors with 100dB Adjustable Alar
$44.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Wuloo Solar Driveway Alarm Wireless Outside Weatherproof 1/2 Mile Long Range
$64.98
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
$10.00
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE hepside 13inch Flush Mount Ceiling Light Fixture 2 Pack, 13inch-2Packs, Black
$66.99$82.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE 4-Pack Replacement Battery for Ring Doorbell - 6040mAh Rechargeable Black
$60.29$66.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Barrina (6 Pack LED T5 4 Feet-6 Power Cords, 6500k Super Bright White
$74.69$82.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
NEW Inovonics EN1265 EchoStream 360° Passive InfraRed Motion Detector
$35.00
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Door Stop Alarm 3 Level Sensitivity Adjustable Door Stopper With 120dB Secu BUAK
$14.78
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
MINICOAST Elite M8 Anti-Spy Detector Device, Black Anti-spy Detector
$13.00
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
NEW Battery-Operated Water Alarm Sump Accessory Detect Leaks Loud 110db Alarm
$16.95
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
DSC WS4904P Wireless Motion Sensor (TESTED - WORKING) Good Condition
$20.00
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Honeywell Ademco 5853 Wireless Glassbreak Detector
$45.00
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE BUNKER HILL SECURITY DRIVEWAY WIRELESS ALERT SYSTEM #93068
$9.95$16.90
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
OPTEX VX-40 OUTDOOR PASSIVE INFRARED DETECTOR
$60.00
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
DSC PG4922 PowerG Wireless Glassbreak Detector 433MHz
$99.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
LOT OF 6 NEW Ring Alarm Contact Sensor Gen 1 w Mounting Kit - FREE SHIPPING!
$69.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
3” Water Flow Switch Waterflow Detector - System SensorWater Flow Switch
$30.00
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.