Smoke detectors

Two alarm relays to control fire-safety dampers, to stop ventilation fans or to activate acoustic and optical alarms etc.
One service alarm relay to let you know when maintenance is needed, before a false alarm occurs.One system error relay indicating fault on the smoke detector circuit.
One Low-Flow relay indicating that air flow in the duct is low or that the UG-5 is installed in an inexpedient place on the duct.