Stanley D-4990 Low Energy Operator Standard Arm
The D-4990 Low Energy Operator may be used with electric latch retraction exit devices, electric strikes, and other electric locking systems. A time delay function is built into the control system eliminating the need for supplemental relays or controls.
The D-4990 Low Energy Operator can be activated with the press of a switch. Virtually any form of knowing act can be used to initiate the operator making integration with existing systems easier.
With the flip of a switch, the D-4990 Low Energy Operator can be configured to activate and open based on a slight movement of the door. Utilizing this option eliminates the need for supplemental activation devices but does not preclude their use.
More information: http://www.amazon.com/Stanley-D-4990-Energy-Operator-Standard/dp/B00CRAGHXU