Briidea Wireless Mailbox Alert 500ft APP Control Anti Mail Theft Waterproof NEW
$26.50
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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.
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Automatic Sliding Door Opener Safety Beam Sensor Infrared Anti-Clip Device a
$23.66
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Magnetic Reed Switch MC-32 NC Surface Mount Wired Security Window Door Contact S
$18.99
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Solar Outdoor Motion Sensor Alarm 2*130db Ultrasonic Siren with 4 Modes Flashing
$55.98
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Black Podium Plexiglass Faceplate with Foams for DDJ-REV7
$125.99
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2-Pack, Dusk to Dawn/Day Night Sensor, Photoelectric Switch, Photo Cell Sensor,
$30.99
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Garage Door Bracket Compatible with R-ing Alarm Contact Sensor (2nd Gen), Eas...
$18.35
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Winland Electronics EAPRO-WHS EnviroAlert Professional Wireless Multi-Function
$100.00
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4PCS Solar Outdoor Motion Sensor Alarm 2*130db Ultrasonic Siren 4 Modes Flashing
$58.98
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ˇSolar Motion Sensor Alarm With Strobe Light For Yard Security
$21.51
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Maestro Motion Sensor Switch MS-OPS2-WH White Occupancy Vacancy Energy Saving
$66.33
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YoLink's YS7903-UC Water Leak Kit: Hub + 4x Leak Sensor NEW
$59.99
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4X GE Audible Window/Door ALARM - Battery Operated 2 Pcs (8 Total)
$25.00
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LM393 Sound Sensor Module High Sensitivity Microphone Detection 5 Pack Arduino
$16.85
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SimpliSafe ES3 (SSES3) door/window wireless Entry Sensor - Tested And Working
$7.99
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SimpliSafe Motion Sensor Gen 2 - Compatible with Gen 3 Base ~ New Open Box
$20.00
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Aeotec SmartThings Multipurpose Sensor - Zigbee - Door/Window & Temperature S...
$55.32
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Kidde Smart Water Leak and Freeze Detector WiFi Alexa Google 60WLDR-W Lot Of 2
$29.99
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Solar Motion Sensor Alarm, 3pc Siren System fits Home Farm & Warehouse Security
$152.52
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SALE Solar Power Motion Sensor Loud Sound Light Alarm Dog Barking Gunshots Repeller
$31.63$51.63
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SALE Guardline Extra Receiver Wireless Driveway Alarm 500 Ft 915MHz New
$49.99$64.97
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Automatic Water Leak Detector with Sensors and Shut-off Valve
$78.59
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SALE Driveway Alarm- 1/2 Mile Long Range Wireless Driveway Alarm Outdoor Weather R...
$56.50$59.47
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SALE New Automatic Light Sensor Control Switch DC8-50V Photocell Light Switch Parts
$11.80$13.26
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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 New 315mhz Infrared Motion Sensor Home Garage Alert Security System
$18.14$20.38
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NEW Steinel Dual HF COM1 Presence Motion Detector Sensor Ceiling 002978
$99.00
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WiFi Water Leak Detector 100dB Alarm Smart Life Tuya Sensor 65mm/2.6in White
$31.50
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SALE Microwave Radar Human Motion Detector Sensor Module for Supermarkets Atms
$18.23$21.20
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SALE 20M One Beam Infrared Sensor Detector Alarm Photoelectric Infrared Laser Sensor
$14.23$16.55
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SALE New 45° Infrared Motion Sensor Home Garage Alert Security System
$18.12$20.59
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SALE Motion Sensor DC 5V 24V Light Switch Movement Detector Automatic PIR Sen G
$9.55$11.10
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SALE 5-24V USB Port Detector Infrared PIR Motion Sensor Switch For Led Light Strip ss
$10.41$12.11
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SALE Automatic Light Sensor Control Switch DC 8V-50V Photocell Light Switch Repair
$11.63$13.52
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SALE 30cm 5V-24V PIR Infrared Ray Motion Sensor Switch USB/DC LED Detector Switching
$10.56$11.87
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Automatic Water Leak Detector with Sensors and Shut-off Valve
$78.60
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Xiaomi Mi Door and Window Sensor 2
$10.00
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Cooper lighting Motion Activated Sensor Single Lite Adapter MSRU180W NIP
$34.95
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BlitzWolf BW-IS6 433MHz Door & Window Contact Sensor Smart Alarm Tuya
$6.00
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Contractor Select CM Series 360° Small Motion Ceiling Mount Occupancy Sensor
$101.35
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Outdoor Solar Wireless Motion Sensor Alarm 4 Modes Flashing 130db Loud Noise
$19.98
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SALE Auto ON OFF Detector Infrared PIR Motion Sensor Switch For Led Light Strip
$10.55$11.99
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120/277-Volt Single Pole Occupancy Sensor Wall Switch PIR Passive Infrared, Whit
$36.13
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Sonoff motion sensor PIR2 - Movement sensors
$10.00
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SALE Swann Leak Alert Sensor - White - Detect Leaks Mobile Alert Brand New ShipsFree
$15.52$17.99
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Solar Outdoor Motion Sensor Alarm 2*130db Ultrasonic Siren with 4 Modes Flashing
$19.98
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SALE New Effective Device Water Leak Alarm Flood Level Overflow Detector Security
$9.85$11.19
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SALE Water Detector IP65 Waterproof Leakage Detector Alarm Leak Detector for Basement
$14.71$15.48
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