ESA Certified Alarm Technician Practice Exam

What does the Quad Element PIR improve upon in the Dual Element concept?

1. Battery efficiency

2. Cost-effectiveness

3. Crosswalk catch

4. Visual clarity

The correct answer is: Crosswalk catch

The Quad Element Passive Infrared Sensor (PIR) improves upon the Dual Element concept primarily through its enhanced ability to detect motion across a variety of angles and distances, which contributes to what is known as "crosswalk catch." This term refers to the sensor's capability to effectively identify and respond to movement in areas where a single plane of detection might miss intruders, thereby improving overall security coverage. By design, the Quad Element PIR incorporates more sensing elements, allowing it to create overlapping detection zones. This results in better sensitivity and reduces the likelihood of blind spots. The additional elements work together to ensure that even if an object moves quickly or if its path crosses between detection zones, the sensor can still register the motion and trigger an alarm. In contrast, other options such as battery efficiency, cost-effectiveness, and visual clarity do not capture the specific advancements made in motion detection capabilities offered by the Quad Element design compared to the Dual Element model. Therefore, the emphasis on crosswalk catch highlights the key improvement in performance and reliability in security applications.