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Where Can I Find Passive 2.45 GHz Tags and Readers?
Please suggest some tags with temperature sensors, as well as appropriate interrogators for the same. Thanks.
The only passive 2.45 GHz tag on the market of which I am aware is Hitachi's µ-chip (pronounced "mu-chip"), which is very tiny and has an antenna etched onto it (see Hitachi Unveils Smallest RFID Chip, Hitachi Unveils Integrated RFID Tag and RFID News Roundup: Hitachi Shrinks Smallest RFID Chip). The µ-chip is designed for a very short read range (just a few millimeters), and could not support a temperature sensor.
Hewlett-Packard developed such a tag in 2006 (see HP Spots New Opportunities for Passive RFID), but I don't think that model actually made it to market.
A company called SCS used to manufacture 2.45 GHz passive tags and readers. I know someone who has about 45,000 tags and four reader-writers with antennas available. These tags do not have sensors, but if you are interested, e-mail your request to firstname.lastname@example.org and I will put you in touch with him.
—Mark Roberti, Founder and Editor, RFID Journal
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