125KHz RFID Proximity ID Cards:

ID cards are known as radio frequency ID Cards, with a frequency of 125KHZ.Now most of ID Cards that available in themarket at present are cards with unique serial number but without power supply.

Its working principle is the card has the ring coil, coil connected IC components so as to form a Resonant circuit with the same frequency as the firing frequency of reading and writing.

Readers send electromagnetic waves, making the resonant circuit resonate and produce current to the ID chip, which is the principle of reading and writing of ID Cards.

There are 4 kinds of chips commonly used for ID Cards:

TK4100, EM4100, EM4205, EM4305.

Technical parameters and application of ID cards
1.Working frequency: 125KHZ
2.Internal Serial Number: 5 bytes
3.Typical applications: access control system, time and attendance system, consumption system, parking lot system and other occasions where there is no high demand for safety.

 According to the thickness, ID Cards can be divided into:

1. Thick card (1.8mm): Thick card can be sprayed with various formats of ID card numbers. It can be screen printing, additional printing stickers or color printing the transparent film then affixed to the cards. It is the world's most economical RFID card because of its very low cost.

2. Standard card (1.05mm): can be double-sided color offset printing, printing photos, can be laser or jet printing various formats of internal code of ID cards and customize serial numbers.

3. Standard thin card (0.8mm): can be double-sided color offset printing, printing photos, can be laser or jet printing various formats of internal code of ID cards and customize serial numbers.