Battery free RFID magnetometer tag

13th November 2013

Farsens S.L.

Nat Bowers

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Datasheet

Farsens has introduced a new battery free RFID sensor tag, the Magneto. It is capable of transmitting a unique identifier and the associated magnetic field measurement data to a commercial EPC C1G2 reader without the need of a battery on the sensor tag. Featuring a reading distance of around 1.5 meters (5 feet), the tag can be embedded in a wide variety of materials such as plastics or concrete.

With evaluation kits available to speed time-to-market, the RFID sensor tag comes in a variety of antenna designs and sizes to adapt the performance to the required application within the 860 - 960 MHz band. The Magneto tag integrates a LIS3MDL magnetometer from ST Microelectronics with a measurement range from ±4 gauss to ±16 gauss. Operating over a temperature range from -30°C to +85°C, the Magneto sensor tag can also be encapsulated for use in harsh environments.

Not requiring batteries is a signifacnt advantage for the Magnerto sensor tag: it can be used in a wide range of opportunities monitoring magnetic fields in applications where the accessibility is restricted, or where the use of batteries is not recommended. Since batteries are not needed, the sensor tags will never have to worry about autonomy.Not requiring batteries or wiring means that the Magneto tags are perfect for retrofitting piping systems (rust monitoring), industrial process automation (actions based on magnetic field changes) or using them as smart dust devices for military or Homeland Security.

Farsens designs and manufactures full passive RFID sensor solutions. Their proprietary UHF RFID IC allows Farsens to develop long range solutions for asset tracking – via the unique ID – and monitoring – via the attached sensor – without the need of any battery on the tag.