Card Access Systems
Proximity readers are the most popular option in commercial access control. They are easy to use, and when cards are lost, it is a simple matter to deactivate them and issue new ones. They can also be combined with photo IDs for additional security. Proximity cards, which can work from one inch to three feet from a sensor, are the most common. Because there is no contact between the card and reader, they are very reliable and suffer little wear and tear. They are also inexpensive. A specialized type of proximity card is the automobile tag, which allows access to a parking facility without requiring the driver to open their window or get out of the car. Automobile tags can work at hundreds of feet away from a sensor. Security access systems can use magnetic stripe or barcode cards, as well, and these can be a money‐saving option if you already use one of these technologies for employee ID cards.