Solar Motion Sensor Alarm Device - Waterproof, Multi-Mode, Wide-Angle Sensing, 1
$185.99
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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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Solar Motion Sensor Alarm Device - Waterproof, Multi-Mode, Wide-Angle Sensing, 1
$44.99
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2Pack Solar Sensor Security Alarm Lights Outdoor, 360° Motion Detector LED Flash
$152.99
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Solar Outdoor Motion Sensor Alarm - Ultrasound & Alarms 129Db Motion Detector Lo
$46.99
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Solar Strobe Warning Lights 90DB Alarm Outdoor,4 Working Modes Solar Power Motio
$35.99
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Solar Strobe Warning Lights with 90DB Alarm Outdoor 2Pack, 4 Working Modes Solar
$60.99
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IKEA TIMMERFLOTTE Temperature/humidity Sensor Smart 506.189.57
$35.99
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Wireless Passerby Alert PIR Motion Movement Sensing Senor Receiver Reminder Mute
$38.91
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SALE Lot of 25 SimpliSafe Original ES1000 Door Window Entry Sensor W Magnets
$23.99$29.99
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2GIG GB1E-900 E+ Extended Range Glass Break Detector
$155.00
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SALE Kidde Smart Water Leak and Freeze Detector WiFi Alexa Google 60WLDR-W
$15.99$17.68
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Chamberlain Wireless Pedestrian & Vehicle Sensor PIR2300R Open Box
$85.50
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130dB Outdoor Solar Ultrasonic Animal Repellent Alarm Keep Cat Dog Raccoon Away
$31.39
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NEW Honeywell SiXGB Glassbreak Detector
$59.99
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2GIG FT6-345 Home Security Water Leak Detector
$39.00
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Wireless Home Alarm PIR Motion Sensor System Infrared Detector Security Kit Set
$48.98
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New 360° High Bay PIR Fixture Mount Occupancy Sensor YM2501A
$19.99
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DSC PowerG PG9945 Wireless Door Window Sensor NEW
$30.00
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Alula RE229 Glassbreak, Honeywell Compatible
$60.00
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SALE Kid-Safe 95dB Door & Window Wireless Alarm - 12 Pack Easy Adhesive Install
$27.54$28.99
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SALE MC-58 NC NO Alarm Security Rolling Gate Garage Door Contact Magnetic Reed Switch
$19.38$20.40
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SALE SENSOR SWITCH CMRB 10 Occupancy Sensor,PIR,2463 sq ft,White
$29.99$49.99
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RAMATEL PG P08303 Wireless Door Sensor Indoor White Battery MPN P08303
$25.00
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SALE SimpliSafe Home Security System Panic Sensor Button (PB3)(SSPB3) USED
$12.71$14.95
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NEW Honeywell Resideo Home IS335 Wired PIR Motion Detector, 40' x 56' , White
$19.95
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SALE 5 x Wired Door Contact Sensor NC Surface Mount Magnetic Reed Switch Black
$15.56$16.38
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SALE LOT NASCOM SECURITY ALARM CONTACT SENSORS SURFACE MOUNT 3/8" RECESSED W/MAGNETS
$11.99$19.99
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XO Infrared Detector XO-CRP01 - Black, Infrared Feature
$19.50
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Sensor Switch CM PDT 10 Occupancy Sensor Daylight Controllers Extended Range 360
$40.00
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20m Single Beam Alarm Photoelectric Infrared Detector Alarm Home Security NEW
$11.20
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AC220V 200W Human Body IR Infrared Sensor Switch Light Auto Control Accessory
$6.71
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Auto On/Off Sensor Switch Motion Infrared PIR Wall Light Lamp For Home Hotel
$11.31
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Motion Sensor Switch with Time/Lux Adjustment AC100-240V for Office & Home Use
$8.64
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4 Mode Solar Motion Detector Alarm 129dB With 13 Sounds For Barn Orchard Use
$26.26
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Smart Thermometer Hygrometer Wi-Fi Temperature Humidity Sensor For Alexa/Google
$18.32
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240° & 360° Replacement Motion Sensor, Adjustable Time & Detection Sensitivit...
$31.00
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Motion-Sensing Loud-Alert Portable Wireless Durable Infrared Motion Sensor Alarm
$47.71
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Heath Zenith Reflex Infrared Motion Sensor Light Control SL-5410A
$16.37
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Solar Outdoor Motion Sensor Alarm - 13 Various Sounds Barking Dog Alarm Gunsh...
$38.08
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Ignition Knock Detonation Sensor E3AZ-12A699-A Compatible with Bronco E-100 Econ
$26.10
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ONTEN Replacement Adhesive for Simplisafe Entry Sensors, Pre-Cut, Easy to Instal
$13.39
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SALE Motion Sensor Light Switch for Hands-Free Control
$21.59$26.99
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SALE Home Security Single Beam Alarm Photoelectric 20M Infrared Laser Sensor Detector
$15.08$16.39
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SALE AC100-240V Motion Sensor Switch PIR Infrared Auto On/Off for LED Lights White
$12.23$13.29
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1/2 Mile Long Range Wireless Driveway Alarm Outdoor Weather Resistant Motion Sen
$134.15
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SALE 3 Pcs Black Magnetic Reed Switch, Wired Door Contact, NO/NC, Surface Mount
$23.48$27.62
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SALE Smart WiFi Temperature Humidity Sensor Meter LCD Hygrometer Thermometer Monitor
$20.09$21.60
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SALE Auto ON OFF Detector Infrared PIR Motion Sensor Switch For Led Light Strip b
$11.06$12.29
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