125 kHz Proximity technology

125 kHz frequency, often referred to as proximity, is used for access control. 



Offers an affordable yet robust solution for entry-level access control

Our proximity card is ISO 7810 compliant, with a nominal thickness of .030". The card features a graphics quality surface optimized for Photo ID printing, and is available in standard PVC construction, or a composite polyester/PVC construction for more demanding high wear and tear environments.


  Blanks stocked in both PVC or composite formula


  Customization, such as pre-printing, magnetic stripe, signature panels, etc. are available. 


  Custom branding, shrink-wrapping in 100's and 100% visual inspection. 

How does it work?


Contactless RFID

A proximity card or prox card is a contactless smart card which can be read without inserting it into a reader device, as required by earlier magnetic stripe cards such as credit cards and contact type smart cards. The proximity cards are part of the contactless cardtechnologies.

Prox cards use a low 125 kHz radio frequency to transmit to a door access reader. When the card is placed on the reader, the card's unique strand of numbers is passed to the access control panel, which verifies if the number matches an approved number in the internal database.

Low Frequency FAQS


You Ask, We Answer

What is the facility code range for 26-bit?

The facility code is usually a number between zero and 255. This number is assigned to your access control system. Along with the sequence number, the facility codes is programmed into each card. This combination of numbers, the facility code and card sequence, is read by the card read and checked against a database of assigned cards. If both the codes match, the door opens.


Unlike a sequence number, which must be unique to each card, the facility code is used on all your cards. An access control card reader may be able to read multiple facility codes. Your business may want to create a rule for assigning facility codes if you use more than one, for example code 50 for a New York office and 80 for an Los Angeles office.


Because you can use more than one facility code in an access control system, it is not required that your new cards have the same code as the old ones. If you do order cards with a new facility code, however, you will have to add it to your access control system.

How many numbers (cards) are available?
What if I need more numbers?
What is Weigand?

The term Wiegand is applied to several characteristics related to access control readers and cards. Unfortunately, the word is used carelessly and can lead to unnecessary confusion. Here are the basics.


Wiegand is:

1. A specific reader-to-card interface
2. A specific binary reader-to-controller interface 3. An electronic signal carrying data
4. The standard 26-bit binary card data format 5. An electromagnetic effect
6. A card technology

What information do I need to find out before ordering?
Are 125 kHz proximity cards considered NFC?


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(415) 585-9600



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Our Location


1370 Rochester Street

Lima, New York, 14485


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8:00 – 5:00 (pst)

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