motion sensor
Detects nearby movement
A motion sensor is a device that detects movement in its surroundings, typically triggering a response like turning on lights, sounding an alarm, or activating a camera.
Motion sensors use various technologies—infrared, ultrasonic, or microwave—to register when something moves within range: The motion sensor turned on the porch light when I walked up.
- detectorDevice that senses
- infraredHeat-bearing electromagnetic waves
- body heatThermal energy from metabolism
- alarmUrgent warning signal
- false alarmErroneous warning signal
security · security system · automatic · lights · outdoor lighting · trigger · passive · beam · movement · intruder · doorway · activation · sweep · range · zone · occupancy · floodlight · porch light
- paranormal equipmentOuija board, spirit box, ghost box, planchette, talking board
- Rhythm Gamesarrows, combo, full combo, timing window, difficulty rating
- Halloweenjack-o-lantern, trick or treating, haunted mansion, pumpkin, trick-or-treat
- securitysecurity guard, security cameras, alarm system, security system, lock
- alarmsalarm, fire alarm, alert, smoke alarm, burglar alarm
- building protectionfireproofing, insulation, waterproofing, lightning rod, fire alarm
motion sensormanual control
Human-directed action
timer switch · push button · toggle switch · light switch · remote control
motion, sensor, motions, sensors, motive, motives, motivation, motivate, motivated