Allflex Electronic ID Tag Comparison
What is the difference between Global 982 vs USDA 840 RFID tags?
Using USDA RFID tags (which start with 840) is the best option because they are considered Official ID in all US states and are approved for interstate travel. With USDA tags, a Premises ID is required which can be applied for through your state's animal health department.
What is the difference between Half Duplex and Full Duplex RFID tags?
Half Duplex (HDX) tags are better able to transmit through metal interference such as metal and steel objects. Full Duplex (FDX) is good when read range is not an issue.
Typical read range on HDX tags ranges from 38cm - 46cm (15" - 18") while typical read range on FDX tags ranges from 35cm - 41cm (13" - 16"). However, FDX tags are more susceptible to interference from metal and steel objects such as headgates, panels, and squeeze chutes as well as fluorescent lights.