RFID Time Attendance Solutions

Tracking employee time and attendance can be fast and simple with the use of RFID based Time & Attendance System.

Each employee is assigned a unique RFID card and they do not have to scan these cards over the reader nor take it out of their bags/wallet. Employees only need to bring these RFID cards in close proximity to the reader each time they pass the entry and exit points of the offices. The data of each employee thus recorded is downloaded on a scheduled basis to automatically deliver accurate time and attendance records. Data collected can also be used for evaluation of work efficiency, improvements and optimize work flow in an organisation.

RFID can be grouped into three categories based on the range of frequencies they use to communicate data: 

Low Frequency (LF)
The LF band covers frequencies from 30 KHz to 300 KHz. Typically LF RFID systems operate at 125 KHz, although there are some that operate at 134 KHz. This frequency band provides a short read range of 10 cm, and has slower read speed than the higher frequencies, but is not very sensitive to radio wave interference.

High frequency (HF) 
The HF band ranges from 3 to 30 MHz. Most HF RFID systems operate at 13.56 MHz with read ranges between 10 cm and 1 m. HF systems experience moderate sensitivity to interference.

Ultra-high frequency (UHF)
The UHF frequency band covers the range from 300 MHz to 3 GHz. Systems complying with the UHF Gen2 standard for RFID use the 860 to 960 MHz band. While there is some variance in frequency from region to region, UHF Gen2 RFID systems in most countries operate between 900 and 915 MHz.

The read range of passive UHF systems can be as long as 12 m, and UHF RFID has a faster data transfer rate than LF or HF. UHF RFID is the most sensitive to interference, but many UHF product manufacturers have found ways of designing tags, antennas, and readers to keep performance high even in difficult environments. 

Low frequency RFID system would have lower range of readability and lower data transfer rate in comparison to HF & UHF systems. If an RFID system operates at a higher frequency, it generally has faster data transfer rates and longer read ranges than lower frequency systems, but more sensitivity to radio wave interference caused by liquids and metals in the environment.


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