A variety of Commercial Systems
Most access control systems can give you greater control than any master key system because you can have time zones and audit trails.
Valley Locksmiths & Security offer a solution for all size access control systems, ranging from a single stand-alone door to an entire building with multiple doors and gates.
Depending on the level of security required, the system can be programmed with time zones to allow access between the hours you specify. Out of these hours the code or fob will not work.
If the system has an audit trail you can see who has entered at what time, and who has been trying to enter and has been denied.
A broad range of products is available including mechanical, battery operated and hard wired.