Sensors & Motion Detectors
sensors & motion detectors — pre-owned
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
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.

Pasco Scientific Rotary Motion Sensor model no. CI-6538
Sensor designed for use with the PASCO.

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

Guardline Wireless Driveway Alarm Receiver
Model: GWireless Driveway Alarm Receiver.

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.

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).
You save $1.44

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.

DSC WS4904P Wireless Motion Sensor (TESTED - WORKING)
Tested and working. Please let me know if you have any questions!
You save $18.64

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.
You save $19.70

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.

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
You save $14.98

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.

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.

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.

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.

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.

LaCrosse Technology Temperature Sensor TX60U-IT)

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.

ecobee Smart Sensor Door and Window White EBDWC01 and battery
These work with Ecobee thermostats.

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.
You save $2.99

Honeywell Ademco Vista 4219 wired 8-Zone Expander pre-owned without front cover
1 x SA4219 wired zone expander.

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.

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

Philips Hue Smart Dimmer Switch Remote 324131092621
Item Details.

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.

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.
You save $2.25

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.

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).

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.

LOT OF 4 Alula RE122 Door/Window Sensor

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

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.

Ademco 998 PIR Motion Detector | Works Great

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.

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

Honeywell 5800PIR-RES Wireless Passive Infrared Motion Sensor Used Working ADT
We collaborated in January 2024 to create project New Era Deals!

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

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.

Aqara Motion Sensor P1, Requires AQARA HUB
Good condition

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).