New DC 10 x RC-33 NC Wired Door Contact Sensor Alarm Magnet Reed Switch
$9.55
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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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AC220V 200W Human Body IR Infrared Sensor Switch Replace Part Light Auto Control
$6.90
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<93% RH Sensor Switch Infrared Human Body Sensing Switch cabinet Sensing
$6.90
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Easy To Remove Water Leak Alarm Flood Level Overflow Detector Sensor
$6.27
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Small Volume Microwave Body Induction Module Radar Induction Switch Sensor
$6.90
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Smart Thermometer Hygrometer Wi-Fi Temperature Humidity Sensor Home Improvement
$18.83
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Automatic Infrared PIR Motion Sensor DC 12V-24V 8A Switch For LED light Strip
$8.20
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20m Anti-Theft Alarm Infrared Detector Sensor Photoelectric Home Security System
$11.51
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Automatic Sliding Door Opener Safety Beam Sensor Infrared Anti-Clip Device d
$23.58
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DC USB Body Infrared PIR Motion Sensor Switch Detector Switch For LED Light k
$8.28
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AC PIR Infrared Body Motion Sensor Detector Control Switch Lamp Light 110V 220V
$5.46
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Motion Sensor DC 5V 24V Light Switch Movement Detector Automatic PIR Sen Timer
$6.55
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Waterproof LED Solar Alarm Warning Light Sensor Lamp Alert Remote Control N
$13.33
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SALE Automatic Water Leak Detector with Sensors and Shut-off Valve
$78.59$82.73
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Solar Driveway Alarm Wireless Outside 1800ft Range Motion
$79.77
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Automatic Water Leak Detector with Sensors and Shut-off Valve
$78.59
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Ring Open Window Slim Magnet for Ring Alarm Contact Sensor - White
$7.98
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SALE Automatic Water Leak Detector with Sensors and Shut-off Valve
$78.59$157.18
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Heath Zenith Reflex Motion Sensor Security Light 190° Detection Zone SL-5314
$21.95
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Automatic Water Leak Detector with Sensors and Shut-off Valve
$78.59
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Wireless Driveway Alarm 1800 Feet Long Range Motion Sensor Alert System Driveway
$48.99
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Driveway Alarm Systems Weatherproof Outdoor Motion Detector & Sensor With120Db S
$59.99
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SALE Automatic Water Leak Detector with Sensors and Shut-off Valve
$77.81$157.18
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TECKNET Solar Wireless Driveway Alarm with 2600FT Long Range & 36 Melodies & 5 V
$42.49
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SALE Hubbell Ivory Vacancy Sensor Wall Light Switch No Neutral PIR 120VAC WS1021I
$23.74$24.99
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Honeywell 5816WMWH Wireless Door/Window Sensor w/ Magnet Indoor White
$18.00
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3-5m Automatic Body Infrared PIR Motion Sensor Detector Switch For LED light I
$11.19
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5V/1A Smart Thermometer Hygrometer Wi-Fi Temperature Humidity Sensor Monitor
$21.59
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AC 85-265V Motion Infrared Sensor Switch For House Garden 180° Detection Range
$13.49
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Infrared Sensor Switch AC100-240V Brand New 1PCS for Office & Home Lighting
$13.49
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Bunker Hill Security Driveway Alert System 93068 Wireless Sensor Open Box
$14.99
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$53.09
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Motion Sensor DC 5V 24V Light Switch Movement Detector Automatic PIR Sen I
$11.19
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5-24V USB Port Detector Infrared PIR Motion Sensor Switch For Led Light Strip
$12.19
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328ft Infrared Motion Sensor Home Garage Alert Security System
$20.79
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Wall Mount 24.125GHz Human Inductive Motion Microwave Radar Sensor For Elevators
$21.19
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ABS 10 x RC-33 NC Wired Door Contact Sensor Alarm Magnet Reed Switch
$14.09
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SALE 3-5m Automatic Body Infrared PIR Motion Sensor Detector Switch For LED light C
$9.68$10.88
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SALE Home WiFi Smart Temperature Humidity Sensor Meter Hygrometer Thermometer Monitor
$18.85$21.18
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SALE New 10 x RC-33 NC Recessed Door Contact Sensor Alarm Magnet Reed Switch
$12.24$13.75
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SALE AC 85-265V Durable Motion Infrared Sensor Switch For Outdoor 180° Detection
$11.71$13.16
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SALE White PIR Motion Sensor Wall Switch AC100-240V for Downlights & Ceiling Lights
$11.71$13.16
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SALE 20M Single Beam Detector Alarm Photoelectric Infrared Laser Sensor Anti Theft E
$14.44$16.23
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SALE DC8-50V Photocell Light Sensor Switch For Automatic Switching Lights Control
$12.32$13.39
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SALE Black 24.125GHz Human Inductive Motion Microwave Radar Sensor For Automatic Door
$19.31$20.99
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SALE 1pc Driveway Alarm Infrared Motion Sensor Home Garage Alert Security System
$18.94$20.59
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SALE New 10 x RC-33 NC Wired Door Contact Sensor Alarm Magnet Reed Switch
$12.78$13.89
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SALE Motion Sensor DC 5V 24V Light Switch Movement Detector Automatic PIR Sen C
$9.68$10.88
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