During a security assessment, you are asked to recommend a control that will both save electricity and alert staff if someone moves inside a locked warehouse at night. The solution should stay idle until a sudden change in infrared heat is detected, then switch on the lights and trigger the alarm panel. Which physical security device satisfies these requirements?
A passive infrared (PIR) motion sensor remains in a low-power state until it detects a rapid change in infrared energy-typically caused by a person entering its field of view. When this change occurs, the sensor can activate lighting and send a signal to the alarm system. An electromagnetic door strike only controls door locking, a bollard prevents vehicle impact, and an RFID badge reader authenticates users but does not detect movement. Therefore, the PIR motion sensor is the appropriate choice for detecting after-hours movement while conserving power.
Ask Bash
Bash is our AI bot, trained to help you pass your exam. AI Generated Content may display inaccurate information, always double-check anything important.
How does a passive infrared (PIR) motion sensor detect movement?
Open an interactive chat with Bash
What are other applications of PIR motion sensors besides warehouse security?