Sensors & Motion Detectors

sensors & motion detectors — pre-owned

1,938listings

Browse 1,938 sensors & motion detectors — pre-owned on eBay — listings updated every few minutes. All items are pre-owned and sold by eBay sellers directly.

eufy Home Alarm System Motion Sensor 30ft Detect Adjustable Sensor|Refurb
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Certified - RefurbishedBuy It NowBest Offer

eufy Home Alarm System Motion Sensor 30ft Detect Adjustable Sensor|Refurb

Eufy Security Motion Sensor. Adding the motion sensor to your existing security system is a breeze. Once installed, pair the device via the eufy Security app. To prevent your playful pets from accidentally triggering the motion sensor, you can adjust the sensitivity so that it only triggers when human-sized intruders are detected.

$19.99
Free ShippingOntario, US
anker_outlet_storeTOP
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99.6%Excellent· 90.5k
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Pasco Scientific Rotary Motion Sensor model no. CI-6538
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UsedBuy It Now

Pasco Scientific Rotary Motion Sensor model no. CI-6538

Sensor designed for use with the PASCO.

$47.00
See listingPonca City, US
quetzalcoatl82TOP
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100.0%Excellent· 1.5k
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RF6CT, RESIDEO SiXCTA - Two-Way Wireless Door / Window Sensor For ADT Command
UsedBuy It NowBest Offer

RF6CT, RESIDEO SiXCTA - Two-Way Wireless Door / Window Sensor For ADT Command

Item is Pre-owned, but is in good fully working condition Comes with the wireless transmitter unit (Honeywell RF6CT), mounting plate, and the magnet Fast and free shipping Buy

$15.99
Free ShippingPhenix City, US
abbwilliam-91
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96.3%Good· 3.5k
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Guardline Wireless Driveway Alarm Receiver
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UsedBuy It NowBest Offer

Guardline Wireless Driveway Alarm Receiver

Model: GWireless Driveway Alarm Receiver.

$34.99
See listingNew Haven, US
uptownsupplyTOP
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99.9%Excellent· 2.3k
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eufy Entry Sensor Send Alert Triggers Siren for Doors Windows Detects|Refurb
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Certified - RefurbishedBuy It NowBest Offer

eufy Entry Sensor Send Alert Triggers Siren for Doors Windows Detects|Refurb

Protect Your Doors and Windows from Break-Ins with eufy Security Entry Sensor. eufy Security: Less Trouble. More Secure. Ever Expandable. Entry Sensor. How to install the entry sensor?. Step 1: Peel off the mounting tape and stick or screw the sensor onto the door or window you want to monitor.

$23.99
Free ShippingOntario, US
anker_outlet_storeTOP
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99.6%Excellent· 90.5k
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eufy Entry Sensor Send Alert Triggers Siren for Doors Windows Detects Indoor-Use
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Certified - RefurbishedBuy It NowBest Offer

eufy Entry Sensor Send Alert Triggers Siren for Doors Windows Detects Indoor-Use

Protect Your Doors and Windows from Break-Ins with eufy Security Entry Sensor. eufy Security: Less Trouble. More Secure. Ever Expandable. Entry Sensor. How to install the entry sensor?. No, it is designed for indoor use only (Not Weatherproof).

$22.55$23.99-6%

You save $1.44

Free ShippingOntario, US
anker_outlet_storeTOP
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99.6%Excellent· 90.5k
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YoLink Water Leak Detector, 1/4 Mile World's Longest Range, Wireless Smart Water
UsedBuy It NowBest Offer

YoLink Water Leak Detector, 1/4 Mile World's Longest Range, Wireless Smart Water

The YoLink Water Leak Detector with model ys7903uc offers the world's longest range at 1/4 mile, making it ideal for detecting water leaks in large areas. This wireless smart water sensor is compatible with IFTTT for seamless integration into a smart home setup. Manufactured in China, this water leak sensor unit quantity is 4, providing comprehensive coverage for safeguarding against water damage in your home.

$15.00
See listingMulberry, US
harperland
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100.0%Excellent· 819
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DSC WS4904P Wireless Motion Sensor (TESTED - WORKING)
-59%
UsedBuy It Now

DSC WS4904P Wireless Motion Sensor (TESTED - WORKING)

Tested and working. Please let me know if you have any questions!

$12.98$31.62-59%

You save $18.64

+$5.45Point Clear, US
jtm_resell
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100.0%Excellent· 9.9k
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eufy Security Garage Door Sensor Add-On for Garage-Control Cam and Cam Plus
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Certified - RefurbishedBuy It NowBest Offer

eufy Security Garage Door Sensor Add-On for Garage-Control Cam and Cam Plus

Easy to Install: Setting up Garage Door Sensor is simple. Just stick, hold, and release with the 3M sticker. Or just fasten into place with screws. At Anker we take a different approach to the market.

$15.29$34.99-56%

You save $19.70

Free ShippingOntario, US
anker_outlet_storeTOP
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99.6%Excellent· 90.5k
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 GE Interlogix 60-807-95R Wireless Motion Sensor, Simon XT XTi Concord
UsedBuy It Now

GE Interlogix 60-807-95R Wireless Motion Sensor, Simon XT XTi Concord

GE Interlogix 60-807-95R Wireless Motion Sensor, Simon XT XTi Concord (Refurbished). This unit is battery operated and functions wirelessly. It features a tamper switch and three-minute motion lockout to conserve battery life.

$34.99
Free ShippingLos Angeles, US
saftymind
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99.9%Excellent· 49.1k
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Lot Of 6 Honeywell Resideo SiXCTA Wireless Door/Window Contact Sensors Only
-30%
UsedBuy It Now

Lot Of 6 Honeywell Resideo SiXCTA Wireless Door/Window Contact Sensors Only

Lot Of 6 Honeywell Resideo SiXCTA Wireless Door/Window Contact Sensors Only. Pre-owned condition with regular wear. Batteries not included. See pictures for details

$34.97$49.95-30%

You save $14.98

Free ShippingKissimmee, US
jabeeze
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100.0%Excellent· 8.6k
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Lot Of 2 SimpliSafe Home Security Glassbreak Sensor SSGB3 GB3 3rd Gen
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Lot Of 2 SimpliSafe Home Security Glassbreak Sensor SSGB3 GB3 3rd Gen

Batteries tested good. The Lot of 2 SimpliSafe Home Security Glassbreak Sensor SSGB3 GB3 3rd Gen is a white, battery-operated glass break sensor designed for indoor use. It features wireless connectivity via Wi-Fi and is wall-mounted. Made of plastic, this sensor is compatible with SimpliSafe systems and offers reliable surveillance technology using IP/Network technology. With its compact design and sleek appearance, this sensor is a convenient and effective addition to any home security system.

$25.95
See listingQueen Creek, US
cantpassthisbuy
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100.0%Excellent· 1.1k
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Philips Hue Smart Dimmer Switch with Remote - 458141 V1 Works with Amazon Alexa
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UsedBuy It Now

Philips Hue Smart Dimmer Switch with Remote - 458141 V1 Works with Amazon Alexa

This sleek and modern switch features a white color and is designed for both indoor and outdoor use.

$20.00
Free ShippingElizabethport, US
thecloseoutgirlsTOP
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99.6%Excellent· 12.7k
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Centralite 3400 ZigBee Wireless Security Keypad. . Cox Homelife, Xfinity,
UsedBuy It Now

Centralite 3400 ZigBee Wireless Security Keypad. . Cox Homelife, Xfinity,

The Centralite 3400 ZigBee Wireless Security Keypad is a white keypad designed for use with Cox Homelife and Xfinity systems. It offers wireless connectivity and utilizes the ZigBee smart home protocol for easy monitoring and control of your home security system. The model, Blink XT, provides a sleek and modern design that fits seamlessly into any home setup, making it a convenient and reliable option for enhancing your surveillance system.

$19.99
See listingPleasant Hill, US
community_value_sales
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100.0%Excellent· 157
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lutron lrf2-ocr2b-p  Passive Infrared Ceiling Occupancy/Vacancy Sensor
UsedBuy It NowBest Offer

lutron lrf2-ocr2b-p Passive Infrared Ceiling Occupancy/Vacancy Sensor

LutronR Radio Powr SavrT Wireless Occupancy/Vacancy sensors are a great solution for warehouse aisles. How To Install Sensors At The Entrance. with 6 to 12 ft (1.8 to 3.6 m) wide aisles.

$50.00
See listingLacey, US
10-bull2010
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100.0%Excellent· 253
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QOLSYS QR0041-840 3.8V 3430mAh BACK UP GOLD BATTERY iQ2 PLUS QS9201 QS9202 PANEL
UsedBuy It NowBest Offer

QOLSYS QR0041-840 3.8V 3430mAh BACK UP GOLD BATTERY iQ2 PLUS QS9201 QS9202 PANEL

Manufacturer : Qolsys. Comparable To : iQ2, iQ2+,QS9201-1200-840. Condition : Preowned in excellent condition.

$18.95
Free ShippingFriendswood, US
bobmish
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99.2%Excellent· 18.5k
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LaCrosse Technology Temperature Sensor TX60U-IT)
For parts or not workingBuy It Now

LaCrosse Technology Temperature Sensor TX60U-IT)

$18.00
Free ShippingTucson, US
12gallon
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99.3%Excellent· 1.2k
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Netgear Arlo Wireless Add-On In/Outdoor Smart Security Light w/ Battery, AL1101
UsedBuy It NowBest Offer

Netgear Arlo Wireless Add-On In/Outdoor Smart Security Light w/ Battery, AL1101

Requires Arlo security light system with Bridge - This is an add-on Arlo security light. Weather resistant: put Arlo lights anywhere - indoors or out. Things You Should Know: An item that has been used previously.

$29.00
Free ShippingDallas, US
offer-down
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99.7%Excellent· 2.3k
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ecobee Smart Sensor Door and Window White EBDWC01 and battery
UsedBuy It NowBest Offer

ecobee Smart Sensor Door and Window White EBDWC01 and battery

These work with Ecobee thermostats.

$13.00
See listingCommerce Township, US
bfmsoft
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100.0%Excellent· 2.6k
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GE In Wall EZ Smart Home Light Switch Control ZW4003 Z Wave Plus
-13%
UsedBuy It Now

GE In Wall EZ Smart Home Light Switch Control ZW4003 Z Wave Plus

We're committed to making things right. Double-check part numbers and product details to ensure compatibility. Lower 48 US states only.

$20.00$22.99-13%

You save $2.99

Free ShippingDanville, US
toto2-163
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99.2%Excellent· 1.5k
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Honeywell Ademco Vista 4219 wired 8-Zone Expander pre-owned without front cover
UsedBuy It Now

Honeywell Ademco Vista 4219 wired 8-Zone Expander pre-owned without front cover

1 x SA4219 wired zone expander.

$27.99
Free ShippingUnion City, US
daynelbian
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100.0%Excellent· 1.4k
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YoLink Door Sensor, 1000 Ft Longest Range Smart Home Wireless Window Door Sensor
UsedBuy It NowBest Offer

YoLink Door Sensor, 1000 Ft Longest Range Smart Home Wireless Window Door Sensor

The YoLink Door Sensor is a wireless window and door sensor that offers the longest range of 1000 feet, allowing for convenient monitoring of your home even when you're far away. Manufactured by YoSmart in the United Kingdom, this smart home device enables reliable and easy connectivity without the need for a central hub. With a unit quantity of 2, this sensor is an essential component for home surveillance and smart home automation, providing added security and peace of mind to your living space.

$15.00
See listingMulberry, US
harperland
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100.0%Excellent· 819
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Lot of 10 Iris iL06_1 CONTACT SENSOR for Indoor Wireless Home Security System
UsedBuy It NowBest Offer

Lot of 10 Iris iL06_1 CONTACT SENSOR for Indoor Wireless Home Security System

$29.99
Free ShippingDayton, US
alex_sari
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100.0%Excellent· 22.8k
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Philips Hue Smart Dimmer Switch Remote 324131092621
UsedBuy It Now

Philips Hue Smart Dimmer Switch Remote 324131092621

Item Details.

$17.99
Free ShippingLaveen, US
yurixtenonto
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6150ADT Keypad
UsedBuy It Now

6150ADT Keypad

USED WITH MINOR BLEMISHES. This Honeywell keypad, model 6150ADT, is a reliable and efficient addition to your home surveillance system. It is compatible with ADT and can be easily connected to your existing wired setup. The keypad is hardwired for power and features a wall mounted design for convenient access. With a white color and 12V voltage, this keypad is perfect for those who want to add an extra layer of security to their home. Its wired connectivity ensures that you get the best coverage and reliable performance. This keypad is ideal for use with sensors and motion detectors, making it an essential part of your home surveillance system.

$19.50
Free ShippingMaricopa, US
jerry2474
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100.0%Excellent· 646
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Tapo T31 Smart Door Window Sensor Starter Kit w/ Hub Matter Compatible
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UsedBuy It Now

Tapo T31 Smart Door Window Sensor Starter Kit w/ Hub Matter Compatible

Item model number: Tapo T31 KIT. Item MPN: Tapo T31 KIT. Item part number: Tapo T31 KIT. • Model: T31 Starter Kit. • Connectivity: Smart Hub System. ⚙ Easy setup with centralized hub connectivity. 🏠 Supports smart automation through compatible platforms.

$42.75$45.00-5%

You save $2.25

Free ShippingMiddle River, US
savaydealsTOP
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99.8%Excellent· 16.4k
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Ring Alarm Motion Detector (2nd gen) Z-Wave - 5AT2S9 (/RT6-22963-5AT2S9-UA)
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Good - RefurbishedBuy It NowBest Offer

Ring Alarm Motion Detector (2nd gen) Z-Wave - 5AT2S9 (/RT6-22963-5AT2S9-UA)

Ring Alarm Motion Detector (2nd gen) Z-Wave - 5AT2S9. Health & Beauty. Requires the Ring Alarm or Ring Alarm Pro Security Kit. Set your security in motion. Advanced motion sensitivity to prevent false alarms from pets.

$15.99
Free ShippingSkokie, US
4surpluscityTOP
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99.2%Excellent· 153.4k
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Safety Turtle 2.0 Pool Alarm – Child/Pet Unit Only – Used
UsedBuy It Now

Safety Turtle 2.0 Pool Alarm – Child/Pet Unit Only – Used

Up for sale is aSafety Turtle 2.0 Pool Alarm – Child/Pet Unit Only. The item isused and showsnormal wear from previous use. Model:Safety Turtle 2.0. Child/Pet unit only (no base station included).

$45.12
Free ShippingEstacada, US
scrappygolf72
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99.7%Excellent· 8.4k
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Cooper Greengate OAC-DT-1000-R Dual-Tech Ceiling Occupancy Sensor 1000 sq ft
UsedBuy It Now

Cooper Greengate OAC-DT-1000-R Dual-Tech Ceiling Occupancy Sensor 1000 sq ft

Cooper Lighting Greengate OAC-DT-1000-R Microset Dual Technology Ceiling Occupancy Sensor. It is a dual-technology sensor, utilizing both passive infrared (PIR) and ultrasonic technologies to detect occupancy.

$49.99
Free ShippingMount Airy, US
sassyspot
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99.5%Excellent· 397
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LOT OF 4 Alula RE122 Door/Window Sensor
For parts or not workingBuy It Now

LOT OF 4 Alula RE122 Door/Window Sensor

$23.95
+$11.95Crystal Lake, US
bigalstrading
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99.3%Excellent· 4.7k
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Bosch ISC-BDL2-WP12G Blue Line Gen 2 Pet Friendly TriTech Motion Detector 2 PACK
UsedBuy It NowBest Offer

Bosch ISC-BDL2-WP12G Blue Line Gen 2 Pet Friendly TriTech Motion Detector 2 PACK

Pre-owned, lightly used Great condition and ready to be set up with your system Fast and free shipping

$49.99
Free ShippingPhenix City, US
abbwilliam-91
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96.3%Good· 3.5k
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Resideo Wireless Door Sensors (2) White for Home Security Entry Monitoring - ADT
UsedBuy It NowBest Offer

Resideo Wireless Door Sensors (2) White for Home Security Entry Monitoring - ADT

The Resideo Wireless Door Sensor in White is designed for home security entry monitoring, specifically with ADT compatibility. This door sensor is powered by batteries and connects wirelessly, providing a convenient and reliable way to enhance your home surveillance system. With the trusted brand of Resideo and its wireless connectivity, this door sensor offers peace of mind for your household's security.

$23.00
See listingOrlando, US
resellerfeller88
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100.0%Excellent· 26
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Ademco 998 PIR Motion Detector | Works Great
UsedBuy It NowBest Offer

Ademco 998 PIR Motion Detector | Works Great

$10.99
Free ShippingCopiague, US
lakecitybuyselltrade
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99.3%Excellent· 24.1k
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SENSOR SWITCH SP-20 SLAVE POWER PACK RELAY CIRCUIT PROTECTION 15v Supply SP20
UsedBuy It Now

SENSOR SWITCH SP-20 SLAVE POWER PACK RELAY CIRCUIT PROTECTION 15v Supply SP20

The PP20 transforms 120, 240 or 277 Volts to Class II 15 VDC to power the remote sensors. Utilizing our Patented Relay Circuit Protection the PP20 also switches the lighting load On and Off. Up to 14 sensors may be connected to one PP20.

$13.95
Free ShippingMadison, US
waterppk
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99.4%Excellent· 3.4k
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Xfinity Zigbee Door Window Sensor Home Assistant - LDHD2AZW - Works Tested
UsedBuy It NowBest Offer

Xfinity Zigbee Door Window Sensor Home Assistant - LDHD2AZW - Works Tested

$12.06
Free ShippingClinton, US
phantomvgcc
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99.7%Excellent· 2.7k
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Honeywell 5800PIR-RES Wireless Passive Infrared Motion Sensor Used Working ADT
UsedBuy It Now

Honeywell 5800PIR-RES Wireless Passive Infrared Motion Sensor Used Working ADT

We collaborated in January 2024 to create project New Era Deals!

$19.99
Free ShippingNavarre, US
neweradeals
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99.6%Excellent· 6.6k
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GE INTERLOGIX UTC QOLSYS 60-807-95R PET IMMUNE PIR NX-481 MOTION DETECTORS x 4
UsedBuy It NowBest Offer

GE INTERLOGIX UTC QOLSYS 60-807-95R PET IMMUNE PIR NX-481 MOTION DETECTORS x 4

$49.99
+$7.99Henderson, US
raiderrust
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99.7%Excellent· 2.7k
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WD71 Water Leak Detector for Wifi Gateway/Hub, 120Db Adjustable Wireless Water S
UsedBuy It NowBest Offer

WD71 Water Leak Detector for Wifi Gateway/Hub, 120Db Adjustable Wireless Water S

WD71 Water Leak Detector for Wifi Gateway/Hub, 120Db Adjustable Wireless Water S. Condition is Used. Shipped with USPS Ground Advantage.

$1.03
See listingHyattsville, US
vill-5327
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99.7%Excellent· 790
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Aqara Motion Sensor P1, Requires AQARA HUB
UsedBuy It Now

Aqara Motion Sensor P1, Requires AQARA HUB

Good condition

$20.00
Free ShippingDenver, US
visionsalesllc
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100.0%Excellent· 1.1k
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Huge Lot of DOBERMAN SECURITY MINI ENTRY DEFENDER w/ CHIME 100dB MODEL #SE-0129
UsedBuy It NowBest Offer

Huge Lot of DOBERMAN SECURITY MINI ENTRY DEFENDER w/ CHIME 100dB MODEL #SE-0129

Also THCHKO alarms with sensor. - Huge lot of over 22+ Loud Sounding Alarm for Safe pool area and child safety pool alert entry alarms. ( See all photos).

$38.00
+$14.00Glendale, US
vartmal
Feedback
100.0%Excellent· 2.1k
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