Ignite Success with the TEJATC Fire Alarm Test 2026 – Sound the Alarm for Victory!

A door hold-open device serves as a supervisory signal in a fire alarm system because it is designed to monitor and indicate the status of a fire door that is normally closed during emergency conditions. When a door is held open, it can interrupt the safe egress of smoke and heat and may indicate a potential issue with fire containment.

Fire alarm systems include supervisory signals to ensure that systems and components meant to protect against fire hazards are functioning properly. The door hold-open device's status can be crucial in maintaining safety protocols, as it alerts the fire alarm panel if the door is unauthorizedly held open, ensuring that the doors can operate effectively during an emergency.

In contrast, heat detectors and smoke detectors serve as primary alarm devices, triggering alerts when they detect temperature increases or smoke, respectively, while the term "primary alarm" also does not pertain to supervisory signals but rather denotes the main alerting function of the system.