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Tagging people with RFID has been a topic of debate for a lot of privacy advocates. Much of the concern arises when people are tagged without their knowledge. Many places, such as in office buildings use employee badges that include RFID as a means of access control to the build. RFID can be integrated with motion sensors to allow access to secured areas to authorized persons without triggering alarms.
Absorption
The human body is mostly liquid so it absorbs the same amount of RFID that most liquids do. See How do Liquids affect RFID read ranges? for more information.
Placement
Most of the time, integrating an RFID tag with an employee badge and hanging that badge from a lanyard around the neck, or hanging it from a belt will work. RFID tags that are kept in wallets, or pockets will still read, but with a highly reduced range. Standard RFID labels can be applied to existing badges to reduce costs.
Pro-Tips
Expected RFID Read Ranges
4"x1" Gen2 RFID - 10' minimum, 30' average when integrated with an employee badge and hung around the neck or from a belt loop.
Expected Costs of RFID Tag
Costs for a blank RFID badge can range from $4 each to $5 each depending on the quantity.
What RFID tag sizes are there?
Standard size for a RFID badge is the same size as a credit card.
Tag Recommendations
The best tag to use for tracking people is the NOX-Badge RFID card. NOX-Badge cards are the same size as a credit card and can be used for employee identification.
A more affordable solution is the NOX-1 4"x3/4" RFID tag. The NOX-1 includes a 4"x1" peel-off traveler label that can be placed on a document for record keeping. Apply the RFID portion of this tag to your existing employee identification cards.
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