A door closer is a mechanical or automatic device that closes a door, in general after someone opens it, or after it was automatically opened.
The 4314ME-SF SENTRONIC® is a heavy duty, electrically controlled closer/holder designed to provide infinitely adjustable hold-open for fire and smoke barrier doors. Door is held open until current interruption releases mechanism and the door closes. Single lever (track) arm closer is specifically designed for interior doors. Learn More$594.56