SALE 6 Pack Door Window Alarm 95dB Magnetic No Wiring 3 Mode Batteries Included Home
$26.99$29.99
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.
SALE 
Zigbee Contact Sensor, Door and Window Monitor, Home Automation, Works with Home
$35.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
15PCS Zigbee Window Door Sensors Smart Contact Sensors For App Home Assistant
$84.44
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Motion Sensor Doorbell 32 Songs 4 Volume Level Indoor Commercial Door Entry NY
$16.54
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
1PCS NEW PEPPERL FUCHS NBN40-U1-A2-T Switch Sensor 4-Pin 10-30VDC Fast Shipping
$21.10
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Smart Home Starter Kit - Hub & 3 Water Leak Sensors, Long Range, SMS/Email Alert
$94.99$99.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Outdoor Solar Motion Sensor Alarm - 129dB Dog Bark & Gunshot Sounds, 4 Modes, IP
$47.49$49.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE New Sealed Honeywell 5800PIR Wireless Passive Infrared Motion Sensor
$40.59$42.72
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Genuine Honeywell 5800PIR-RES Wireless PIR, Pet Immune Motion Sensor - Brand New
$47.35$49.84
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
【New】BLACKUBE Rechargeable Motion Sensor, Set of 2 Fishing Light 25g
$68.00
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Govee Life Water Leak Detector 1s w/ Smart Gateway 1s H5059+H5044 1 +3 Pack
$24.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Enerwave ZWN-RSM1-Plus Home Automation Hidden Smart Single Relay Switch
$28.00
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
NOS VTG JEA-800 Japan Electro Alarm Radar Security System Complete In Box...
$199.77
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Alinco Twin Charging Stand EDC-158R
$64.86$68.27
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE ALINCO Single Rapid Charging Stand EDC-175 (Requires up to 6 units) EDC-196R
$89.20$93.89
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE ALINCO EDC-138A Rapid Charger (4h)
$72.17$75.97
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Alinco AC adapter for charging EDC112
$48.85$51.42
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Alinco EDC-312R 5-Bay Charging Stand
$110.82$116.65
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Alinco Linked Charging Adapter for EDC-158R EDC-162
$83.61$88.01
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE ALINCO Alinco 12/24V compatible external power adapter EDH-43
$67.65$71.21
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Kenwood UBC-8ML AC adapter for connecting multiple units.
$67.19$70.73
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
HTZSAFE Owl Home Security Wireless Driveway Alarm 1 Receiver + 2 Sensors
$49.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE $87.75$92.37
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Acuity Controls WV 16 Corner Mount Motion/PIR Sensor Wired Indoor White 184CHV
$16.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Acuity Controls nLight NWV PDT 16 Wired Dual Tech Indoor Corner Sensor White
$44.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE DSC LC-200 PIR Pet Detector Motion Sensor LOT OF 2
$31.01$32.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Honeywell 5816 Wireless Door Window Contact Sensor WITH MAGNET
$14.00
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Ring Mailbox Sensor in White New In Box
$29.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
KERUI Driveway Alarm Wireless System Outdoor Motion Sensor for Home Security
$16.00
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
3-Way Motion Sensor Light Switch - PIR Infrared, Adjustable Timer & Sensitivity,
$89.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Motion Sensor Alarm Indoor: Wireless Motion Detector Alarm with Siren & Strobe (
$365.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
LETWESAF Accurate Radar Perimeter Alarm mmWave Motion Sensor
$312.32
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Dual Laser Detector Alarm Beam Sensor Indoor 300M Outdoor 60M Infrared Detector
$65.12
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE Zigbee Motion Sensor - mmWave Radar, AI Learning, HomeKit, Alexa, Google Home Co
$89.09$98.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
New TOPGREENER Dual Tech Humidity Sensor Switch Infrared PIR Motion Air Moisture
$28.49
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
360 Degree Ceiling Occupancy Sensor PIR Motion Sensor Switch with 3 Detectors,10
$27.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
RadioShack Wireless Mail Guard Alert Mailbox Protector 63-1110 Audio Visual NEW
$29.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
2 Pack 240° Motion Detector Sensors, Adjustable Delay & Sensitivity, 60ft Range,
$44.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Wireless Motion Activated Light Control - Plug-in, Adjustable Detection Range, T
$62.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Honeywell DT8360 Dual Tec Motion Sensor- With Mirror Optics
$30.00
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
LG Smart Multi Sensor - Daylight Harvesting and Motion Detecting-9sd131vvda
$12.50
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Garage Door Magnetic Contact Sensor, Wired Normally Closed NC Magnetic Switch wi
$17.63
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE 24 Pcs Wireless Door Window Alarm Sensors - Home Security Burglar System, Anti-T
$48.44$50.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Lot Of 2 Honeywell 5800PIR-RES Wireless PIR
$89.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Solar Outdoor Motion Sensor Alarm-129db Loud Siren Lamp Noise Maker, 4 Workin...
$51.15
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE AC180-240V 50/60Hz Auto On/Off Light Voice Sound Sensor Switch Time Delay C
$2.99$3.14
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
Htzsafe Solar Driveway Alarm System 1/4 Mile Range
$75.21
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.
SALE 25ft Signal Bell Ringer Tubing - 3/8" Thick Rubber Air Hose for Drive-Thru & Ala
$55.09$57.99
View on eBay
Affiliate link — we may earn a commission, at no extra cost to you. Read our affiliate disclosure.