SALE New Water Leak Alarm Flood Level Overflow Detector Sensor Home Security Alert
$10.16$11.29
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Sensors & Motion Detectors deals
Discounted security listings from eBay sellers, biggest markdowns first. Prices and availability change fast — confirm on eBay before buying.
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE 
SALE 1pc Driveway Alarm Infrared Motion Sensor Home Garage Alert Security System
$18.62$20.69
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Home Security Single Beam Alarm Photoelectric 20M Infrared Laser Sensor Detector
$14.84$16.49
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Wi-Fi Water Leak Detector - Battery Powered, Smart Home Compatible, Easy Install
$207.89$230.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Adjustable Power Restoration Alarm with LED - Compatible with All Generators
$46.79$51.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE STEINEL PASSIVE INFRARED WALL SWITCH OCCUPANCY SENSOR # IR WLS DIM-W
$67.50$75.00
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE PowerBACK Mains Return Alarm - 100dB Alert for Home Load Centers – Modern Style
$64.79$71.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE DC8-50V Photocell Light Sensor Switch For Automatic Switching Lights Control
$12.14$13.49
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Auto ON OFF Detector Infrared PIR Motion Sensor Switch For Led Light Strip 5-24V
$10.88$12.09
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE STEINEL PRESENCE CONTROL PRO US ONEWAY COM1-24
$81.00$90.00
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Durable Weather-Resistant Driveway Alarm - Smart Security for Your Home
$62.99$69.99
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-129db Loud Siren Lamp Noise Maker 4 Modes NEW
$26.09$28.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE LoRa Smart Door Sensors: 5yr Battery, Door Left-Open Reminders, Home Assistant
$125.09$138.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Solar Alarm LED Strobe Light Infrared Motion Sensor Detector for Home Farm Yard
$38.69$42.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Sensorswitch Cmrb 10 Fixture Mount Sensor, Occupancy, Photocell, 0 To 10V
$113.99$126.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE SimpliSafe Compatible Replacement Adhesive - Strong Double-Sided Tape 10 Pads
$11.69$12.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Water Leak Starter Kit: Hub + 4 Leak Sensor 4 (105 dB Siren), LoRa Long-Range,
$78.93$87.70
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Water Leak Detectors 6-Pack | 12V Battery, 95dB Alert, Easy
$87.29$96.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Solar Driveway Alarm 1800ft Range Wireless Outdoor Motion Detector System
$99.89$110.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE 10 Pack Dusk to Dawn Sensor, Heavy-Duty Photoelectric Switch, Listed, 120-27...
$151.19$167.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE 433MHz Wireless Pet-Immune PIR Detector For HOMSECUR 4G WIFI Alarm System
$22.85$25.39
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Smart Motion Sensor with 60ft Detection & 3 Modes - Black, Wall-Mountable
$21.59$23.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Vintage From Diablo Technologies Solid State Sensor lamp Timer/ Model STT-1
$13.50$15.00
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Easy-to-Install Motion Sensor - 180-Degree Detection for Maximum Home Protection
$21.59$23.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Bunker Hill Pressure Sensitive Alarm Mat - 22" x 14" w/ Cord and Alarm Device
$35.95$39.95
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE 5 Pack Water Leak Alarm Detector, 120dB Loud Alert Water Sensor, Waterproof,...
$64.79$71.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE 5 Pack Water Leak Detectors for Home, 4 Levels Adjustable Audio 0-120dB Water...
$64.79$71.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Optex RC-2 Wireless Sensor Annunciator System Receiver Alert Alarm w Manuals
$25.98$28.87
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Wyze Home Monitoring Bundle Hub Keypad Motion 2 Entry Sensors System Kit
$53.99$59.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Wyze Entry Sensor V2 - 3-pack - WSES2-3PK - Home Security System
$35.99$39.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Safe House Infrared Photorelay Alarm 49-307. New In Box. User Manual Included
$54.00$60.00
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE 2 - Bunker Hill Security Door / Window Entry Alarm 2 Pack of 2 94983 New Sealed
$8.88$9.87
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE 110-220V Switch Body Motion Detector Microwave Radar Delay Sensor for LED Light
$9.63$10.70
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE AC 220V-240V 5.8GHz Microwave Movement Motion Detector Sensor Switch For Light
$11.54$12.82
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE 129dB Infrared Motion Detector Alarm with Solar Power - Versatile Security
$41.39$45.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE DSC LC-100-PI Digital PIR Detector With Pet Immunity 88030093 New Open Box
$16.87$18.74
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE EVA Logik Ultra-Thin Glass Break Alarm Perfect for Any Window 4 Pack NST003
$13.49$14.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE HONEYWELL HOME PROA7-1 Pro Series Mid-Range 7" All-in-One Touchscreen Control
$161.99$179.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE SW2 Water Leak Detector Sensor with 95dB Alarm, No Subscription Fee, Home Wir...
$31.44$34.93
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Extra Loud 120DB Door Window Alarm Sensors 10pk Battery Powered Security
$79.19$87.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE LED Strip Light Stair Lighting Controller Motion Sensor System Full Set
$107.99$119.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE LED Strip Light Stair Lighting Controller Motion Sensor System Full Set
$107.99$119.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Long Range 1/2 Mile Driveway Alarm, Outdoor Motion Detector, DIY Home Office ...
$145.79$161.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Wi-Fi Pool Alarm Solar Wave Pool Alarm & Optimal Sensitivity App Control HGPA-03
$67.49$74.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE New GE Wireless Alarm System Garage Door Sensor Choice Alert 45130 - 2 Pack
$16.16$17.95
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Home Automation Zigbee Sensors 2-Pack – Effortless Security for Doors & Windows
$62.99$69.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Automatic Outdoor Light Sensor for 3" Lamp Posts - Easy Installation, Listed
$16.19$17.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE 2026 LED Strip Light Stair Lighting Controller Motion Sensor System Full Set
$107.99$119.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.