I do not believe what you are describing is possible. An RFID transponder in an ampule would be a low-frequency (LF) device, with a read range of no more than 18 inches, and there is no way to obtain 30 feet of read range via a tag smaller than 1 inch. A smaller tag has a shorter read range since the tag antenna is smaller and can capture less energy. If the tag has less energy, then it emits a weaker signal that can be interrogated from a shorter distance.
—Mark Roberti, Founder and Editor, RFID Journal
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Are Any RFID Tags Available at Around 120 MHz? »