ADT SIXGBA Wireless Glass Break Detector Alarm Sensor White Home Security
$49.99
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.
Sensores De Movimiento Para Casas Negocios Puerta Ventana Antirobo Con Alarma
$47.49
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Risco Rokonet RK210PT COMET PET Motion detector NOS
$20.00
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
New Effective Device Water Leak Alarm Flood Level Overflow Detector Security
$6.36
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Wireless PIR Motion Sensor Detector Ringtone Alarm Home Entry Doorbell 3 Sensors
$43.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
NEW Visonic Ltd SPY-1 Wired Long Range PIR Passive Infrared Motion Detector
$20.00
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 PIR Infrared Auto On/Off for LED Lights White
$13.29
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
New Water Leak Alarm Flood Level Overflow Detector Sensor Home Security Alert
$11.19
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
AC 85-265V Portable Motion Infrared Sensor Switch For Outdoor 180° Detection
$13.29
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Black PIR Switch Infrared Motion Lighting Sensor Detector Wall Pavement Switch
$15.25$16.05
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Magnetic Door Switch RC-33 NC Recessed Wired Security Window Door Contact Sen...
$12.69
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
MC-32 NC Magnetic Reed Switch Surface Mount Wired Door Window Alarm, Magneti ...
$25.12
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Metalux WP 2 ft. 1800-Lumens 4000K Cool White 120-Volt 2 ft,
$48.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
🙌 NEW GREENGATE 360° CEILING OCCUPANCY SENSOR 2000 SQ. FT. 30VDC OAC-DT-2000
$58.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
APEC WATER WiFi Water Leak Detector 3 Pack App Connected Alerts w/ Sound IP66
$26.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Zigbee Smart Window Door Gate Sensor Contact Detector Smart Life Security Alarm
$14.16
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Wireless PIR Motion Sensor Detector Ringtone Alarm Home Entry Doorbell 4 Sensors
$47.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Solar Driveway Alarm Wireless Outside 1800ft Range, Outdoor Motion Sensor & D...
$63.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
DC 5V 12V 24V 3A Highly Sensitive PIR Motion Sensor Light Switch Infrared IR Sen
$6.89
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Motion Sensor Light Battery Operated, Waterproof Wireless Indoor Outdoor Sec...
$48.44$50.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Sunlight Sensitive Photo Electric Switch
$26.39$32.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
DSC PG8934P Wireless Security Motion Detector Open Box
$29.95
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Dual Passive Infrared Motion Detector - Wired PIR Sensor
$30.59$50.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE 10.525GHz Microwave Motion Sensor for Raspberry Pi & Arduino
$33.59$55.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Glentronics BWD-HWA Watchdog Water Alarm - White
$13.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Bosch ZX935Z Motion Detector POPIT PIR 35ft (11m) Alarm Sensor
$42.00
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
LED Flush Mount Ceiling Light Fixture, 5000K Square-White, Daylight White
$34.17
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Smart Motion Sensor for Hue Lights - Wireless, Easy Setup, Requires Hue Bridge
$77.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Ultra-Slim Door Window Alarms - Easy DIY Installation
$45.59$56.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
3 PACK Water Leak Leakage Detection Detector Sound Alarm Sensor Security Alert
$9.00
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Honeywell Resideo FG-1625 Glassbreak Detector FlexGuard Alarm Sensor
$30.00
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Basement Watchdog Water Alarm - 110 dB Alert
$23.99$29.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Water Pipe Leakage Detector, Water Leak Detection Tool, Underground Water Pipe L
$79.15
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
DMP Model 1122 Wireless Security Alarm PIR Motion Passive Infrared, New Open-box
$45.00
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Resideo 997 Ceiling Mount PIR 360° Motion Detector Security Sensor New/Open Box
$45.00
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Lot Of 2 - SimpliSafe Home Security Entry Sensor ES3
$17.99$22.97
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Wireless Infrared Motion Sensor Alarm Alert 3 Sensors Detect Prevent Intruder In
$38.21
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Samsung SmartThings Multipurpose Sensor Contact Motion Temp Humidity Zigbee NEW
$14.00
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
1pc Driveway Alarm Infrared Motion Sensor Home Garage Alert Security System
$20.59
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
2018-2023 Jaguar E-Pace Anti-Theft Infrared Sensor Connector C2Z4458
$97.28
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Cync Smart Wireless Motion Sensor Switch, White - 93105005
$47.92
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Garage Door Bracket Compatible with Simpli-Safe Alarm Entry Sensors, Works wi...
$12.36
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
NICECNC Sensor Protection Plate Sensor Shield Sensor Guard Compatible with BMW R
$79.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
2 Pack 240-Degree Replacement Motion Detector, Adjustable Delay Time & Detect...
$37.73
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Sealed GE Smart Home Indoor Magnetic Window Alarm Sheds Garage Boats. CB1
$8.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
ONEVER Motion Sensor Outdoor Switch PIR, Light Beam Sensing Switch with Relay...
$12.01
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
DMP 1106-W Wireless Universal Transmitter White Security Alarm Sensor 1106W
$35.00
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
ADC-S2000-T-RB Temperature Sensor ALARM.COM Wireless Smart New
$34.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.