What is the Keri MS Format?

What is the Keri MS Format?

by Mike Boehm on June 19, 2023

Keri Systems: A Dive into the Keri MS Format and Keri MS Cards/Keyfobs

Keri Systems is a respected name in the field of access control and integrated security systems, providing services on a global scale. Established in 1990 and based in San Jose, California, the company has always been at the forefront of technological innovation. 

In this article, we will cover the Keri MS format and Keri MS cards/keyfobs, exploring their features and specifications (where publicly available) Additionally, we will also briefly touch upon the company's other product lines, providing a comprehensive overview of the diverse solutions Keri Systems offers to meet the security needs of businesses worldwide.


Keri Systems Products

Their product range is extensive, spanning electronic access control, video surveillance, and integrated security systems. Whether you're a small business needing a single-door system, or a larger entity requiring a networked system for multiple buildings, Keri Systems has the expertise to cater to your needs: 

  • NET Software – is not just an access control management solution; it's a comprehensive security management software application that can manage both TCP/IP-based NXT hardware and RS-485 networked PXL-500 hardware, as well as third-party hardware platforms such as Mercury, Allegion, and Schlage. Doors.NET Software is suitable for both small businesses and large corporations. 
  • NXT Hardware – The NXT Hardware line by Keri Systems is a comprehensive suite of access control products that include controllers, readers, and cards/tags. These products are designed to work seamlessly with Keri's Doors.NET software. 
  • Keri MS Series Proximity Readers – The Keri MS Series Proximity Readers are not only durable and reliable but also versatile, being compatible with the PXL-500P Tiger Controller. These readers are available in various configurations, including the MS-3000 Mullion for door frames, MS-5000 Single Gang for wall switches, MS-7000 for extended range, and MS-4000 for vandal resistance. 
  • Keri Cards and Tags – The Keri Systems proximity cards and tags come in various formats to suit different needs. These include the NXT-K key-fob in Keri NXT Format, PKT-10X key-fob in Keri MS Format, and PSK-3 key-fob in 26-bit Wiegand Format. 

Keri MS Format

The Keri MS format, a proprietary protocol developed by Keri Systems, is a key component of their access control solutions. Despite its widespread use, particularly in conjunction with the PXL-500 Tiger Controller, little is publicly known about the specifics of this format. Keri Systems has maintained a level of confidentiality about the inner workings of its format, which is a common practice in the industry to ensure the security and integrity of its systems. 

What is known, however, is that the Keri MS format operates in the low-frequency range of 125 kHz. This frequency range is commonly used in access control systems and RFID applications due to its ability to provide a good balance between read range and system performance. 

One of the critical features of the Keri MS format is its unique identification protocol. This ensures that no two cards share the same number, providing a high level of security and reliability for the system. This unique identification system is crucial in access control scenarios where the integrity and security of the system are paramount.


Keri MS Cards/Keyfobs

Keri Systems' MS Series Proximity Cards are designed for use with MS-Series Proximity Readers. They offer a range of features that make them a reliable and secure choice for access control systems: 

  • Wallet-Friendly – The cards are thinner than comparable proximity cards, making them easy to carry in a wallet or purse. 
  • Durable – These cards are highly durable and designed to withstand everyday use in a wide range of temperature and humidity levels. 
  • Unique ID Codes – Each card has a unique ID code, enhancing the security of the system. 
  • Lifetime Warranty – Keri offers a lifetime warranty on some cards, underscoring their commitment to quality and durability. 
  • Interchangeability – Cards can be used interchangeably on the same system without worry about ID code duplication or format matching. 
  • Read Range – The read range varies depending on the model of the reader used, Ranges fall between 1 inch (2.5 cm) with some models and in less ideal conditions and as high as 15 inches (38 cm) in a clean RF and electrical environment with the card presented parallel to the reader surface. 

Let’s now cover the four specific types of proximity products available using the Keri MS proprietary format:


KC-10X Standard Light Proximity Card

  • Provides maximum read range performance in a thin package
  • Manufactured with a vertical hanging slot punch to be easily carried in a wallet or purse or worn on clothing with a clip or lanyard
  • Can print bar codes
  • Lifetime Warranty
  • The size of the card is 2.13" x 3.38" x 0.065" (54 mm x 86 mm x 1.6 mm)
  • Each card is sequentially numbered (except for C5 formatting) 

Unless the user requires the combination of magstripe and proximity, the KC-10X Standard Light Card is recommended over the MT-10X Multi Technology Card whenever possible because of its lower cost and lifetime warranty. The Standard Light Cards can be fitted with a PVC label or “skin” which can accept a direct printed image to provide photo ID at a much lower cost and greater durability.


MT-10X Multi Technology Proximity Card

  • Allows the user to combine several identification technologies in a single credit card thin credential
  • Can print barcodes
  • Can accept a direct print video image, typically a photograph, a bar code, and other graphics from most industry standard dye sublimation printers, to create a custom access credential
  • The size of the card is 2.13" x 3.38" x 0.042" (54 mm x 86 mm x 1.1 mm)
  • Each card is sequentially numbered (except for C5 formatting)
  • Comes with a 1-year warranty 

The key cards can be ordered with or without a high coercivity magnetic stripe, which is helpful if there are other types of systems in use that are magstripe based, such as cafeteria vending. They are also convenient for customers who may have a proximity-based access control system at one site and a mag stripe-based system at other locations, allowing the user to carry a single card.


PKT-10X Proximity Key Fob

  • 100% transfer molded and can withstand the weight of a vehicle
  • The size of the fob is 1.57" x 0.98" x 0.157" (40 mm x 25 mm x 4 mm)
  • Each fob is sequentially numbered (except for C5 formatting)
  • Comes with a lifetime warranty 

Keri's PKT-10X Proximity Key Fob provides user convenience in a small, ergonomic, and extremely durable package. The fob is equipped with a brass eyelet for attachment to a key ring, ensuring the neck of the tag will not break during the life of the system.


AP-10X Adhesive Proximity Patch

  • Has a peel-off sticky back that turns your familiar personal items, such as a wallet or cell phone, into proximity credentials
  • Can be applied to photo IDs or most existing RFID cards as well 

The AP-10X Adhesive Proximity Patch provides a flexible and convenient solution for those who prefer not to carry separate cards or fobs, transforming everyday items into proximity credentials.


Keri MS Card Readers

The MS Series readers are designed with a modern, attractive aesthetic and a thin profile. They are compatible with Keri’s KC-10X and MT-10X proximity card styles as well as the robust PKT-10X key tag. 

They can also read any Indala ASP card or tag if they are to be used in conjunction with a PXL-500 Controller. This compatibility ensures a versatile and comprehensive access control solution. 

All of the Keri MS (MicroStar) readers utilize the 125 kHz frequency and are designed to work with the Keri MS format. 

These readers are also exclusively compatible with Keri's access control system based on the PXL-500 Tiger Controller. It can also be used with the NXT-2D/-4D and MSC-2D/4D Controllers when using an Interface Module. This compatibility allows for cost savings and the continued use of existing credentials when upgrading to the newer NXT controllers.


MS-3000X Proximity Reader

  • This reader has dimensions of 3.4" x 1.4" x 0.38" (86 mm x 36 mm x 10 mm)
  • The reader offers a read range of up to 4" (10 cm).
  • IP67 waterproof rating, which makes it suitable for both indoor and outdoor installations
  • Lifetime Warranty
  • Designed for mullion mounting


MS-5000X Proximity Reader

  • The reader has dimensions of 4.3" x 3.0" x 0.38" (109 mm x 76 mm x 10 mm)
  • This reader offers a read range of up to 7" (18 cm).
  • IP67 waterproof rated, making it suitable for both indoor and outdoor installations.
  • Lifetime Warranty
  • Designed for US junction box mounting

MS-7000X Proximity Reader

  • The read dimensions of 6" x 8.5" x 0.83" (15.2 cm x 21.6 cm x 2.1 cm)
  • This reader offers an impressive read range of up to 15" (38 cm).
  • IP67 waterproof rated, making it suitable for both indoor and outdoor installations.
  • Lifetime Warranty 

It is particularly useful in applications where extra range adds to the convenience of the system, such as parking entrances or when reading through extra thick building materials.


MS-4000X Proximity Reader

  • The reader offers a 2″ read range (5 cm).
  • The reader is designed to withstand high levels of vandalism. The face of the reader, which covers the electronics, is made of a material consisting of many layers of interwoven fiberglass, providing bulletproof integrity from both .357 and 9mm handguns.
  • The reader is also flame resistant.
  • Its housing is made of stainless steel and is beveled to prevent prying.
  • The reader is UL 752 listed for bulletproof integrity, ensuring its resilience against firearm attacks.
  • The reader features front and rear "blind" mounting screw holes for extra security, making it difficult to remove from its mounting forcibly.
  • Lifetime Warranty 

The MS-4000 ShootingStar Vandal Resistant Proximity Reader is a robust and durable reader designed specifically for high-crime areas. This reader is built to withstand extreme conditions and potential vandalism, making it a reliable choice for security in challenging environments.


Explore Your Keri MS Compatible Credential Options with Authoriz-ID

To ensure seamless integration with your Keri MS system, consider exploring the range of Keri MS compatible credentials available at Authoriz-ID. Our selection includes key fobs, proximity cards, and adhesive tags that are designed to work flawlessly with Keri systems readers like the MS-3000X, MS-5000X, MS-7000X, and MS-4000X. 

Here are some of the options you can find: 

You can find our complete Keri MS-compatible credential options HERE.

Please note that these credentials for Keri key fob systems DO NOT WORK WITH Keri NXT readers and products!

Whether you're looking for a simple key fob or a printable card, Authoriz-ID has you covered. Our products offer the same functionality as Keri’s PKT-10X, MT-10XP, and KC-10X products, but at a fraction of the cost. 

So why wait? Enhance your access control system with Keri MS-compatible credentials from Authoriz-ID today! 

If you have any questions about compatibility, please don't hesitate to contact our support experts at (970) 682-0765 or via email at support@authoriz-id.com. We are available from 8 AM to 3 PM MDT, Monday to Friday.