An automatic door closer (more often called a "door opener") opens the door itself, typically under the control of a push button, motion detector or other device, and then closes it as well, typically employing a motion or proximity detector to determine when it is safe to close the door.
The Norton Power Track® Closer-Holders combine the functions of a single point electromechanical door holder with the proven reliability of a P7705PTO Door Closer. The track assembly contains an arm slide and solenoid operated hold open mechanism. The closer is mounted on the door. The Power Track and hook-up box are mounted to the frame face for push side installations. The Power Track is an aluminum extrusion which incorporates a solenoid actuated cam that locks the arm slide in the track at a selected point. The degree of door hold open is selected by adjustment of the telescoping arm. When there is power to the unit, the door will hold open at the selected hold open point. Any power interruption will release the arm slide and the door will close. The door can be released manually at any time. Learn More$443.85