Capacitance proximity sensors detect changes in electrical capacitance, which can be influenced by environmental conditions. Changes in relative humidity can affect the dielectric properties of the air or materials nearby, potentially causing false alarms or degraded performance.
B (Temperature) and C (Air movement) typically affect other sensor types (e.g., infrared or ultrasonic).
D (End-of-line resistance) applies to alarm circuit supervision, not proximity sensing.
[References:, PSP Study Guide – Intrusion Detection Technologies, POA Manual – Capacitance Sensor Functionality and Environmental Factors]
Contribute your Thoughts:
Chosen Answer:
This is a voting comment (?). You can switch to a simple comment. It is better to Upvote an existing comment if you don't have anything to add.
Submit