Door Alarm Window Sensors, Door Open Alarm Long Battery Life Wireless for Securi
$24.99
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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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SALE 1/2PCS Solar Alarm LED Light Solar Strobe Light Wireless Motion Sensor Detector
$12.69$13.79
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Wireless Driveway Alarm, Outdoor Weatherproof Motion Sensor & Detector with 600F
$38.97
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8-Pack Motion Sensor Stair Lights - Warm White LED Night Lamps for Safety
$47.99
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INTERLOGIX 1085TG-1PK SURFACE MOUNT MAGNETIC CONTACT, 3/4" GAP, CLOSED, 100V
$8.99
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Photocell Sensor Beam for Sliding Gate Opener Infrared Safety Photo cell 12/24V
$19.77
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EVB Wi-Fi Vibration Motion Sensor 6 Axis IMU Accelerometer
$285.65
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Solar Outdoor Motion Sensor Alarm: 129Db Dog Barking & Gunshot Sound,Loud Motion
$29.99
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Solar Motion Sensor Alarm (4) Read
$67.95
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Optex Wonderex AX-100S Photoelectric Detector
$38.99
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ENERLITES MWOS-W MULTI TECH OCCUPANCY SENSOR WALL SWITCH, 120/277V, 800W, WHITE
$56.99
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NEW Honeywell DT8035 Dual TEC Motion Sensor Detector High Sensitivity
$64.99
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Bea 10R2e-100 Active Infrared Sensor For Request
$159.99
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Driveway Garage Motion Sensor Wireless Alert Secure System Alarm Doo
$24.13
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Aojoowey Alarm Ultrasonic Detector 1 Pack
$44.99
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5 Pack MC-31 NC Magnetic Door Window Contact Sensor Reed Switch with Screws
$13.99
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SALE Cooper SP20-MV: Greengate Switch Pack 20 Amp 120/277V 50/60 Hz Appliance Control
$18.89$20.99
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ELPA ASA-W13-2PPW Low Profile Slim Alarm
$35.43
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Replacement Door Window Sensor for Home Security LDHD2AZW (Pack, 2)
$37.99
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FM231 Wireless Driveway Alarm Electromagnetic Vehicle Detection Indoor Receiver
$67.99
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Magnetic Window and Door Alarm (2-Pack)
$32.99
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Solar Outdoor Motion Sensor Alarm 2*130db Ultrasonic Siren with 4 Modes Flashing
$19.98
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3X-Aqara Water Leak Sensor Zigbee Wireless Detector for Smart Home Requires Hub
$49.99
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Zigbee Motion Sensor, Pet Friendly, Compatible with Home Assistant, Smartthings,
$39.99
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6 Pack Wireless Security Window/Door Alarm, Magnetic Sensor Door Window Burglar
$26.99
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2 Pack Water Leak Detectors, 100Db Water Sensor Alarms Flood Detector for Baseme
$26.99
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JUDAS-1 TACTICAL HEARTBEAT SENSOR, 320X240, EDEN TECHNICA
$499.00
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Banner 29541, SM312CVQDP Mini-Beam Photoelectric Sensor NOS
$129.99
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Wireless 90DB Window & Door Alarms for Kids Safety - 6 Pack Security Solution
$23.99
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8pcs WiFi Door Alarm Wireless DIY Smart Home Security System Phone APP Alert
$39.89
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SALE Solar Alarm LED Light with Strobe Light Motion Sensor Detector Wireless Outdoor
$12.69$13.79
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PG9984P PowerG Wireless Dual Tech Motion Detector with Pet Immunity Up to 85l...
$112.42
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New in Box VERKADA SV21-HW Air Quality Sensor
$349.99
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INSTALLATION ESSENTIALS Dual-Zone Field Disturbance Sensor (508D)
$69.18
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$29.99
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Solar Outdoor Motion Sensor Alarm - Dog Barking & Gunshot Sound 130Db Motion Det
$37.34
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Sensor Switch CM 10 Passive Infrared Extended Range Range, White
$69.99
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3 pack SimpliSafe Motion Sensor **NEW SEALED**
$59.95
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$10.00
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Entry Alarm Smart Work Lot 2 Wireless
$9.99
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Solar Outdoor Motion Sensor Alarm, Dog Barking&Gunshot Sound,130Db Loud Noise Ma
$38.66
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Solar Outdoor Motion Sensor Alarm - Dog Barking & Gunshot Sound, Support Reco...
$42.11
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3 Packs Motion Sensor Light , PIR Sensor Detection ,Ceiling or Wall Mount 5612
$14.46
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Solar Outdoor Motion Sensor Alarm with 3Volume Control & Voice Recording, 129Db
$207.73
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Tuya Zigbee Wifi Human Presence Sensor Mmwave Radar Detector with Luminance Sens
$27.96
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SALE Water Leak Leakage Detection Detector Sound Alarm Sensor Home Security Alert
$8.18$9.09
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SALE 120db Water Leak Alarm Flood Level Overflow Detector Sensor Home Security Alert
$8.82$9.69
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1PC KEYENCE IV-G500CA Vision Sensor New
$631.08
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