125khz Low Frequency Cards (LF)
Low Frequency (ISO11784/5,ISO14223)

Low frequency smart cards are predominantly used in identification and access control applications. LF cards have lower read range and communication speeds than other contactless smart card types and the most common chips offer low-cost and low-security solutions where a simple UID or identification key is required. Due to the shape of their waves, LF cards are less affected by other radio signals and materials in the environment such as water or metal which makes them a reliable choice in industrial environments. Common 125khz / 134khz cards offered by OPRFID include:

TK4100: Simple read-only chip with 128 bit factory programmed UID used in access control, anti-counterfeiting and logistics.
EM4100 / EM4200: Simple read-only chip with 128 bit factory programmed UID used in access control, anti-counterfeiting and logistics.
EM4450 / EM4550: Read/Write chip with 1Kbit EEPROM and password protection used in ticketing, access control and prepayment devices.
Hitag 1: Read/Write chip with 2Kbit EEPROM used in logistics, asset tracking, industrial ID and automation.
Hitag 2: Read/Write chip with protected 256bit EEPROM and multi-tag operability used in logistics, asset tracking, casino gaming and industrial automation.
Hitag S: Read/Write chip based on Hitag 1 available in 256bit and 2048bit options used in logistics, asset tracking, brand protection and automation.
ATA5577 / T5577: Read/write chip with 363bit EEPROM and write protection, used in access control, hotel keycards, logistics and gaming.