SALE Magnetic Door Sensor Doorbell Close Door Reminder Window Burglar Safe Alarm
$10.33$15.89
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Sensors & Motion Detectors deals
Discounted security listings from eBay sellers, biggest markdowns first. Prices and availability change fast — confirm on eBay before buying.
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SALE 
SALE ZigBee Tuya Smart Human body Exists Sensor Detector Radar Wave for Home Security
$35.16$54.09
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SALE ZigBee PIR Motion Sensor 120° Wireless Infrared Detector Security Burglar Alarm
$19.30$29.69
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SALE Lot Of 7 DSC LC-100PI Digital PIR Detector With Pet Immunity w323
$90.99$139.99
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SALE STI Rex Plus Electronic Watchdog ED-50 Sound Activated Alarm Tested Works
$58.49$89.99
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SALE Honeywell SiXCT Two-Way Wireless Door / Window Sensor (Used)
$10.00$14.93
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SALE SimpliSafe MS3 Motion Sensor Detector Security System - NIB-B1A
$15.00$22.38
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SALE ADT Door / Window Sensor, Model# SSH1R0-29-S, New In Box
$10.00$15.00
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SALE SimpliSafe Motion Detector Sensor (MS3)(SSMS3) Gen 3
$15.00$22.38
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SALE NEW SimpliSafe Entry Sensor 3rd Generation White Door and Security ES3 SET OF 2
$16.95$25.00
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SALE BUNKER HILL OEM 93068 WIRELESS SECURITY ALERT SYSTEM NEW IN BOX NIB 4B
$19.99$28.99
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SALE Bunker Hill Security Wireless Driveway Alert System Model 93068 Range 400 Ft
$19.99$28.99
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SALE HUBBELL/BRYANT MS1200I PIR WALL SWITCH, IVORY, 1200 SQ FT, 120/277 VAC 60Hz, NIB
$31.50$45.00
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SALE Expandable Wireless Motion Sensor Alarm - 1/2 Mile Range for Property Security
$63.69$90.99
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SALE Small Water Leak Detector Alarm 3 Pack Battery Powered Simple Install
$56.62$80.89
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SALE Hidden Camera Detector, 2025 Upgraded 8th Gen Camera Detector Model P18
$10.49$14.99
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SALE Home Business Door Open Alarm 500FT Wireless Chime Entry Alert System Kid Safe
$31.27$44.67
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SALE Black 24.125GHz Human Inductive Motion Microwave Radar Sensor For Automatic Door
$14.00$20.00
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SALE Wireless Vibration Alarm Security Anti-Theft 110dB Loud Remote Control Bike M...
$31.27$44.67
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SALE Bright Solar Motion Sensor Alarm 129dB Siren Strobe Light Remote USB Backup
$40.44$57.77
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SALE Eve Motion Wireless Motion Sensor SEALED Apple Home Privacy Home Security C
$55.99$79.99
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SALE Eve Motion Wireless Motion Sensor SEALED Apple Home Privacy Home Security C
$55.99$79.99
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SALE Eve Motion Wireless Motion Sensor SEALED Apple Home Privacy Home Security C
$55.99$79.99
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SALE Eve Motion Wireless Motion Sensor SEALED Apple Home Privacy Home Security C
$55.99$79.99
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SALE 2 Ademco 4278EX-SN Multiplex Motion Sensor
$42.00$60.00
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SALE Wireless RF Door Entry with Receiver Lighting Control By Defiant with Batteries
$11.16$15.95
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SALE Maestro Motion Sensor Switch MS-OPS2-WH White Occupancy Vacancy Energy Saving
$46.43$66.33
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SALE 2 Pack Water Leak Detectors 100dB Flood Sensor Alarm Home Basement Bathroom W...
$27.10$38.71
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SALE New Matte White Motion Sensor Switch, PIR Infrared, Single Pole, Ground Wire
$35.44$50.63
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SALE SimpliSate Door Entry Sensor ES3 White, Latest Gen 3, New
$17.50$25.00
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SALE ADT Motion Sensor SSM5R0-29-WH New Sealed
$12.00$17.16
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SALE Honeywell DT-7435 Dual Tec Motion Sensor New inbox
$34.30$49.00
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SALE Leviton Occupancy Sensor, Fixture Mount, PIR, High Bay, 2 Interchangeable Lenses
$22.39$31.99
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SALE Simplisafe 1st Generation Alarm System Glass Break Sensor Read
$10.49$14.99
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SALE Hive Window or Door Sensor Smart Home Indoor - Factory Sealed
$6.29$8.99
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SALE Smart Zigbee Motion Sensor Battery Powered Indoor White Alexa Home Assistant
$39.53$56.47
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SALE Defiant Wireless Home Security Door/Window Alarm Kit Multipack - New, Sealed
$13.96$19.95
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SALE PIR Motion Sensor Light Socket E26/E27 – Smart Auto On/Off Indoor Lighting
$21.69$30.99
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SALE Wattstopper WS-250-W Passive Infrared Wall Switch Occupancy Sensor 120/277VAC
$48.69$69.56
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SALE Adjustable Motion Sensor Light Socket for E26 Bulbs - Auto On/Off Night Control
$23.79$33.99
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SALE PIR Motion Sensor Light Switch - 90-250V Auto On/Off for Secure Outdoor Lighting
$13.99$19.99
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SALE Lot of 2 ELEGRP Sensor Light Wall Switch Passive Infrared Motion Activated WHT
$22.00$30.93
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SALE Mighty Mule Driveway Alarm Vehicle Detection Alert Sensor Wireless Kit FM231
$29.95$42.00
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SALE Chamberlain CWA2000 Wireless Motion Alert System BASE ONLY NO SENSOR
$22.99$31.99
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SALE Lot Of 2 - SimpliSafe Home Security Entry Sensor ES3
$17.99$25.00
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SALE Black PIR Switch Infrared Motion Lighting Sensor Detector Wall Pavement Switch
$11.38$15.81
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SALE Sensor Switch Street Light Control Adjustable Rain Anti‑Thunder Protection 220V
$16.31$22.65
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SALE 5Pcs Magnetic Proximity Sensor High Frequency Approach Sensor 2 Wire Normally
$37.69$52.35
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