Agrippa Acoustic Door Holder Refuge System Operates at a minimum differential

Operates at a minimum differential air pressure of 0

provided by a double-pole change-over relay

this spacer will accommodate 1/2″ and 3/4″ conduit

The releasing trigger reacts to a particular sound rather than simply a loud noise

Includes its own Mains power supply that requires its own standby battery supply

Agrippa Acoustic Door Holder Refuge System Operates at a minimum differentialAgrippa Acoustic Door Holder The Agrippa door holder learns the sound of your specific fire alarm, releasing the door in the event of a fire. This new innovation in the industry is also wire free, so it can easily be retrofitted to any door. The releasing trigger reacts to a particular sound rather than simply a loud noise, significantly reducing false activations. Datasheet.