motion detector
Senses nearby movement
A motion detector is a device that senses movement in a designated area, typically triggering an alarm, light, or camera.
Security systems use motion detectors to detect intruders; automatic doors and lighting systems use them to respond to approaching people.
Most work through infrared sensing, detecting body heat against background temperature.
Heat-bearing electromagnetic waves
- ultrasonicAbove audible frequency range
- microwaveRadiation-based kitchen heater
- passiveNot actively participating
- activeIn operation now
sensitivity · range · trigger · calibration · adjustment · wiring · battery-powered · wireless
Urgent warning signal
- intruderUnauthorized person present
- burglarOne who breaks in
- theftUnlawful taking of property
- protectionGuarding against harm
surveillance · monitoring · CCTV · camera · trespasser · perimeter · deterrent · prevention
Dwelling with integrated automation
- lightingArt of illuminating spaces
- occupancyState of inhabiting space
- thermostatAutomatic climate control device
- HVACIndoor climate management
energy saving · automatic doors · convenience · timer · dimmer · hands-free · trigger · activation
infrared
Heat-bearing electromagnetic waves
- ultrasonicAbove audible frequency range
- microwaveRadiation-based kitchen heater
- passiveNot actively participating
active · sensitivity · range · trigger · calibration · adjustment · wiring · battery-powered · wireless · mounting
alarm
Urgent warning signal
protection · surveillance · monitoring · CCTV · camera · trespasser · perimeter · deterrent · prevention · watchdog
smart home
Dwelling with integrated automation
- lightingArt of illuminating spaces
- occupancyState of inhabiting space
- thermostatAutomatic climate control device
HVAC · energy saving · automatic doors · convenience · timer · dimmer · hands-free · trigger · activation · presence
presence
State of being somewhere
approaching · heat signature · body heat · crossing · entering · exiting · gesture · wave · proximity · range
- security devicessecurity camera, alarm, security key, security badge, vault doors
- paranormal equipmentOuija board, spirit box, ghost box, planchette, talking board
- detectorsheat sensor, infrared sensor, proximity sensor, Geiger counter, light sensor
- perimeter securitychain-link fence, barbed wire, razor wire, electric fence, security gate
- security systemsalarm, alarms, alarm systems, firewall, antivirus
- warningswarning, alert, caution, danger, warning sign
motion detectorheat detector
Device sensing excessive warmth
pressure sensor · smoke detector · proximity sensor · light sensor
motion, promote, detective, motive, detect, commotion, promotion, detection, mobilize