infrared sensor
Thermal radiation detector
An infrared sensor detects infrared radiation—the heat energy emitted by objects warmer than absolute zero.
These devices appear in motion detectors, thermal cameras, remote controls, and night-vision equipment.
The infrared sensor triggered the automatic door.
Some measure temperature without contact; others detect movement by sensing changes in heat patterns.
- thermalPertaining to warmth
- heat signatureDetectable infrared emission pattern
- heatTransferred thermal energy
- detectionAct of finding something
- motionChange in position
motion detector · wavelength · temperature · night vision · night vision goggles · remote control · security · security system · alarm · camera · beam · proximity · warmth · body heat · body temperature · invisible · spectrum · radiation
- detectorsmetal detector, smoke detector, motion detector, heat detector, lie detector
- measuring toolstape measure, ruler, yardstick, tablespoon, teaspoon
- security systemsalarm, alarms, alarm systems, firewall, antivirus
- Ghost Huntingghost hunting, haunting, apparition, EVP, spirit box
- Military Sensorsearly warning radar, thermal imager, night vision, hydrophone, mine detector
- security alarmsburglar alarm, panic buttons, car alarm, fire alarm, motion sensors