How Access Control Works

Access Control Products

We are an industry leader in the manufacture of
access control and security systems

Access Control is the practice of monitoring and controlling access to a building or property using modern electronic means, as opposed to old-fashioned locks and keys.

Over 90,000 Organizations Chose Keri When Security Mattered Most

Components of an Access Control System

An access control platform is fully integrated to manage anything from a small single door to enterprise level management systems, covering access control, elevator control, safety management, automation systems, video management, parking management, situation control, and much more.


  1. Management Software
  2. Controllers
  3. Readers
  4. Credentials


Credentials are cards and tags that can be scanned by a reader.

Access control credentials come in many forms, often as a card, fob, or clicker. These credentials are tied to an individual user and are each encrypted to ensure security. Every single credential in an access control system can be given access rights that only allows them to gain access through certain doors. In essence, credentials allow for the management and monitoring of people through a building.


Explore Credentials

RF Transmitters and Receivers

Keri’s line of RF Transmitters and Receivers can be used with the PXL-500W family of Tiger Controllers, or any other manufacturers’ access controllers that are 26-bit Wiegand-compatible. One-button and four-button transmitters, typically attached to a key ring, provide up to 500 feet (150 m) of transmit range to the receiver. The four-button transmitter can be programmed for multiple frequencies to accommodate multiple receivers.


Explore RF Transmitters

Management Software

Doors.NET is Keri’s flagship access control software application, designed to manage the NXT TCP/IP-based hardware platform. It was designed natively in Microsoft’s .NET platform and utilizes their SQL database engine with all instructions and communication with the database done through Stored Procedures, making responses lightning quick.

AWS Cloud Access Control

Borealis Cloud Solution

Easy installation, no maintenance, and no on-site PC required. Manage and sync your access control installation with the cloud using Borealis. Powered by Amazon Web Services cloud infrastructure.


Client-Server Management


Doors.NET is installed to an on-site server or personal computer. Use Doors.NET to manage credentials, automate tasks, and integrate your hardware with third-party products like CCTV to create your own custom access control solution.



Our most popular controllers

Take a look at Keri’s renowned access control products, from our NXT MSC range using Mercury Security firmware, to our Bluetooth controlled application.

NXT is Keri’s newest access control platform providing unmatched system flexibility, ease of use, and cost effectiveness. Utilizing true peer to peer Ethernet communications for networking between controllers and software, the system has eliminated the single point of failure prevalent in most other access control systems. A new standard in security, NXT is first of a new generation of equipment to utilize encrypted data from Cards to Readers.

Single Door Access Control Systems

IntelliProx BLUE Controller

Programmed wirelessly through the use of a Bluetooth connection, so the only requirement is the app (loaded on an iOS or Android mobile device) and proximity to the controller via Bluetooth.


IntelliProx Controller
Networked Access Control Controller

NXT MSC Series Controllers

Extremely intelligent controllers operate virtually autonomously minimizing network traffic and eliminating bandwidth concerns. Unmatched security does not come at a price, however. Using the latest in electronic processing and networking technology, NXT is one of the most cost-effective systems on the market.

NXT Controllers

Additions to Doors.NET

Visual Doors

User-Friendly Administration Client for Easy Access Control

Graphically access the most commonly used features of Doors.NET. VisualDOORS is Keri Systems’ answer to those looking for an access control system with powerful software and abundant features, yet simplified, the way you’ve always envisioned it. VisualDOORS builds upon the strong foundation of Doors.NET and presents itself to the user in a clean and highly graphical, user interface.

Learn About Visual Doors


Graphic Map Access Control

Keri’s TelepathyTM is a powerful, new, graphical mapping, command and control client that is enabled, free of charge, for a single site with the purchase of Keri’s Doors.NET access control software. (A simple call to Keri’s in-house support group is all that’s required to get a license modified to include Telepathy functionality.)

Learn About Telepathy

Telephone Entry Systems

Keri Systems Entraguard Telephone Entry System

The Entraguard System sets the standard for high-performance telephone entry equipment. Easy-to-install, reliable, and durable – Entraguard systems are designed to operate over a telephone network or through existing building lines, minimizing wiring installation and maintenance costs. Easy-to-use – whether you’re programming the system or you’re a visitor contacting a resident, you’ll find the Entraguard system is as easy as 1-2-3.



Entraguard Titanium

The Entraguard Titanium, represents a breakthrough in telephone entry by providing 250 tenant capacity with a 4-line LED display in a small, attractive package, all at an extremely low price. The small footprint allows it to be mounted almost anywhere, and its rugged stainless steel enclosure with built-in hood is designed to withstand the toughest environments.

Entraguard Titanium


Entraguard Silver

TheEntraguard Silver is the newest member of Keri’s Entraguard telephone entry product line. This unit provides 750 tenant capacity with a large-font, 4-line display in an attractive, rugged stainless steel enclosure. The Silver can be fitted with a PXL-500 Tiger Controller and an SB-593 Satellite Expansion Board to provide one or two door card access capability within the unit itself.

Entraguard Silver

Entraguard Platinum

The Entraguard Platinum has the largest capacity and biggest display Keri offers. Handling up to 5,000 tenants, this unit is designed for durability and weather resistance using a tough, 14-gauge stainless steel enclosure.

Entraguard Platinum


Fingerprint Readers for Access Control

Keri’s BioSync™ Readers provide reliable fingerprint reading in attractive and unobtrusive packages. Readers are available in ­ fingerprint -only, ­ fingerprint + card, and ­ fingerprint + keypad versions. Typically used in higher security applications, they can be used either for primary user identification (­ fingerprint -only) or for secondary veri­fication based on initial use of a card or PIN.


Fingerprint Reader
Keri Extensive Warranties

Reliability Assured

We stand by our engineering and craftsmanship and are so confident of reliability that we back our products with extensive industry-leading warranties.