Server/Client Access Control Solutions
Keri NXT Series
Easy Installation and Configuration of Server/Client Solutions
Doors.NET™ Software and NXT Family of TCP/IP-based Access Control Components
Over 90,000 Organizations Chose Keri When Security Mattered Most






"Our lead tech, John McCleery, and I are very appreciative of your support with this project as well as your support in the past" - Security21

90,000+ Installs
Thousands of successful installs and lessons learned.
"Working with Keri is like hitting the Easy Button. It's just a great partnership" - Rick Estess
15+ Million Cardholders
Over 15 million people use Keri Systems credentials.
"Thank you for your top-notch professionalism and amazing customer support" - American Knights Security
37 Countries
Keri Systems has installations and experts around the world.
Integrate with with Doors.NET™
Doors.NET™
Managing and monitoring doors made simple.
Enjoy powerful control software that lets you manage and monitor installations of any size — whether you’re securing 3 doors or 30,000.
Learn About Doors.NET™NXT MSC Controllers
Ethernet-based for peer to peer communication and to host. Flash updatable. Available in 2 or 4 door versions.
View Product
NXT Controller Add-Ons
4 Input/Output I/O Expansion
Networked via RS-485 to Controller. 4 supervised inputs/4 outputs. Flash updatable.
View ProductNXT-RM3
Allows connection of Wiegand output readers to NXT Controllers and allows the connection of Keri MS Series Proximity Readers for legacy systems.
View ProductNXT-WI Plus
Allows connection of Wiegand output readers to NXT Controllers. Mounts on and connects directly to NXT Controller.
View ProductNXT Credentials & Readers
Proximity Cards and Tags
Keri Systems offers 4 types of Credentials that are seamlessly compatible with all of our NXT Hardware.
View ProductNXT Readers
- Connected to Controller via RS-485 with a heartbeat so readers are supervised.
- Encrypted data from Cards to Readers to Controllers.
- 64-bit encrypted format.
- 1,000 Ft cable distance to controllers.
i2 Appliances
Pre-loaded with Doors.NET Access Control Software.
- Turn it on and discover your controllers, then start programming immediately.
- Eliminates errors and variability found in customer-provided or off-the-shelf PCs.
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.
Grow Your Business with a Custom Keri Solution
Win new business and grow your security company. We're by your side from initial bid to final inspection.
Step 1
Tell us your security project specifications
We begin the process with a 15-30 minute phone call to determine if we have a solution that can meet the needs of your job.
Step 2
Together, we design an affordable solution
Our expert support team will help you design a security solution that meets your client’s needs and your financial requirements.
Step 3
We partner with you to win new business
Once a plan is designed, there is still a competitive bidding process. We help you convince stakeholders and win new business
Step 4
Expert customer support available
Once you've closed the sale and are on-site installing equipment, our expert technical support team is on-hand if you need assistance