In 2011, wireless solutions provider RFID Sensor Systems met with several potential partners to market passive ultrahigh-frequency (UHF) EPC Gen 2 RFID tags that included various sensors and could transmit sensor data without the use of a battery. The firm developed the technology to provide end users with small, inexpensive RFID sensor tags that would not require battery replacement (see N.J. Company Seeks to Market Passive Sensor RFID Tags). The company currently offers the Ranger family of passive temperature sensors, comprising models ST050-1 and ST050-2 , ST070-1 and ST070-2.
—Mark Roberti, Founder and Editor, RFID Journal
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