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A Primer On UHF And RFID Tag Readers

EAR TAG RULES:

Required for all cattle, sheep, and bison leaving the herd of origin in Canada.

The national livestock identification program is administered by the Canadian Cattle Identification Agency in cooperation with the Canadian Food Inspection Agency.

RADIO FREQUENCY IDENTIFICATION (RFID) TAGS:

Several low-frequency RFID tags are approved for use in Canada; all operate in the 125 134.2 kHz frequency range.

There are two approved technology platforms – full duplex (FDX) and half duplex (HDX) – and tag readers in Canada must be able to read both. When scanned, FDX transponders communicate continuously with the tag reader, simultaneously receiving and transmitting information to and from the reader. However, an HDX transponder receives a signal from the tag reader and alternates transmitting and receiving at a very high rate of speed.

Can only read one tag at a time within a two-foot range.

ULTRA-HIGH FREQUENCY (UHF) TAGS

Come with active, semi-a ctive or passive battery assistance.

Operate in 860 960 MHz range.

The technology is improving and becoming cheaper because of the interest of large multinationals, such as Walmart, which use the tags for product tracking.

Can read 60 tags per second from as far away as 60 feet.

Recently approved in the U. S. as an acceptable form of livestock identification.

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