This would involve a short reading distance below 5 centimeters. Do you know of anyone who has tested such an application?
To get an answer to your question, I reached out to Jame Heurich, the president of RFID, Inc., one of the few companies that still makes low-frequency (LF) systems. Here is his reply:
“I don’t believe it to be possible, since an LF tag must use a hard copper coil, and [being] bent to any significance will result in breaking the coil or separating the chip from the coil. While there are LF label tags, 10 millimeters is far too small, and if it could be done, a very short range of perhaps 1 centimeter can be expected. They may wish to consider using a tag that clamps onto the hose or a label-type tag that can hang from the hose, akin to a lanyard. Perhaps a small UHF label; however, the smallest I have measures 16 by 13 millimeters.”
—Mark Roberti, Founder and Editor, RFID Journal
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Where Can I Find an RFID Interface for 125 KHz LF Readers? »