Which condition should NOT be present for outdoor intrusion sensors?

When considering the conditions that should not be present for outdoor intrusion sensors, proximity to water bodies is the correct focus. Outdoor intrusion sensors are designed to detect unauthorized access or activity in a given area, and their effectiveness can be significantly compromised when placed near water bodies.

Water bodies can create various challenges for intrusion detection systems. For example, they can introduce environmental factors such as humidity, which might lead to false alarms or sensor malfunctions. The presence of water can also attract animals or insects, which could further trigger false alerts.

In contrast, while high humidity, movement of pets, and exposure to sunlight can also influence the sensor's performance, they are less critical in determining the installation site's appropriateness compared to proximity to water bodies. Humidity may affect sensor responsiveness, pet movement can be accounted for in sensor calibration, and exposure to sunlight is typically manageable through proper sensor selection and placement strategies. Therefore, minimizing the risk of false alarms and ensuring optimal functionality makes avoiding proximity to water bodies a key consideration in deploying outdoor intrusion sensors.