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E-magazine RFID & Wireless IoT Global Issue 02/2022
AS321x Battery-Less UHF RFID Sensors

AS321x Battery-Less UHF RFID Sensors

AS321X is a passive UHF RFID chip family embedding an analog sensor interface and internal sensors.

It achieves state-of-the-art sensitivity performance including sensor biasing and readout.

Lionel Geynet

Lionel Geynet
RFID Project Manager
Grenoble, France

Key Features

  • RAIN RFID (UHF EPC Class1 Gen2, ISO 18000-63) interface
  • No battery (no maintenance)
  • Wireless (easy to merge tag with the object)
  • Use of existing infrastructures (can be read by any RAIN RFID reader up to 7 m)
  • Fast data collection (sensors read can be done within 10ms)
  • Temperature monitoring going from -40 °C to 125 °C


  • Building
  • Structure Health Monitoring
  • Predictive Maintenance
  • Food Quality Control
  • Livestock Monitoring
  • Watering Control
  • Logistics

Asygn is world's first provider of UHF RFID sensor chips enabling batteryless sensing applications.

Fully compliant with RAIN RFID infrastructures, the AS321X chips feature an analog interface for connection to external sensors and on-chip sensors such as temperature, strain, ambient light, magnetic field, motion or electrical contact.

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