What is the name of the device that is connected to a circuit, which in turn is connected to an alarm panel?

The device that is connected to a circuit and interfaces with an alarm panel is referred to as a detector. Detectors serve crucial roles in security systems as they sense specific types of signals or changes in the environment that may indicate a breach or emergency. For example, a motion detector can sense movement, while a smoke detector can identify smoke in the air.

This connection to an alarm panel allows the detector to trigger an alert when a certain threshold is met, ensuring that responses are initiated in real time. This role is fundamental in electronic security systems, as the effectiveness of the entire system often relies on the reliability and functionality of detectors. Other terms listed, like alert system, monitor, and alarm, refer to different aspects or components of security systems but do not appropriately describe the device that connects directly to the circuit shared with the alarm panel.