Fire alarm systems utilize various components to detect and alert occupants to a fire. Key materials include sensors like smoke detectors (ionization and photoelectric), heat detectors, and flame detectors, which trigger alarms when fire conditions are met. Sounders and strobes, often combined, provide audible and visual alerts. The fire alarm control panel (FACP) acts as the central hub, receiving signals from detectors and activating notification devices. Power supplies, both primary and backup, ensure continuous operation.