What part of a smoke detector should not be covered or blocked during installation?

The sensor area of a smoke detector is a critical component responsible for detecting smoke and initiating an alarm. If this area is covered or blocked, it can significantly impair the detector's ability to sense smoke particles in the air, rendering the device ineffective in alerting occupants to a fire. Smoke detectors rely on clear access to the air for accurate detection, and obstructing the sensor can lead to delayed response times in emergency situations.

In properly installing smoke detectors, it is essential to ensure that the sensor area remains unobstructed to maintain optimal functionality and compliance with safety standards. Other components like the battery compartment, wiring harness, and housing unit play significant roles in the overall operation of the detector, but it is the sensor area that is paramount for the device’s primary function: smoke detection.