With a growing selection of antenna choices and sensor ICs, SMARTRAC’s sensor tag and inlay family offers state-of-the-art products with great flexibility to accurately measure moisture and temperature conditions in industrial, healthcare and many other applications. Sensor inlays and tags are passive UHF inlays equipped with RFMicron’s Magnus® IC family. These RFID sensor inlays offer great performance, and are a perfect choice where moisture and temperature detection is an important requirement. Their specific antenna design acts as a resistor/inductor/capacitor (RLC) tuned circuit to enable an antenna to sense its environment. The antenna converts environmental data into an impedance change, and the sensor tag IC translates this into a sensor code, as it dynamically matches antenna impedance to die impedance. These single-chip sensor inlay and tag solutions are cost-efficient and easy to implement, and work on different surface materials ranging from textiles to metal parts to construction materials. They can be deployed where active or semi-active sensors are not practical, and involve no battery maintenance, costs or problems with product lifetime or recycling. Delivery formats are dry and wet to suit all converting-industry needs.

1. Lauri Hyytinen, Head of Segment Automotive
Passive UHF Sensing Inlays

2. Background
Source GS1
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3. Inlay price erosion
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4. Industry trends
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5. Challenge
What if RFID could offer more than an
unique number and small electrical
memory?
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6. Traditional RFID sensors
Active sensors:
 Expensive
 Complicated structure
 Special requirements for
readers
 Short lifetime
 Difficult maintenance
 Challenging recycling.
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7. Passive RFID Sensors
1. RFMicron is offering 2 sensor IC’s at the moment.
2. MagnusS2 can measure moisture content, recognize liquids, measure
pressure and proximity.
3. MagnusS3 has a temperature sensor build inside the IC and it can do same
than S2 with higher resolution.
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Benefits:
 Similar structure to standard RFID
inlays
 Easily deployable
 Long lifetime without maintenance
 Easy recycling
 Great read range
 Follows industry-standard ISO
18000-6 UHF protocol

8. Sensor Chip Capabilities
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CHAMELEON ENGINE
Self tuning capability to
optimize performance
for different antenna
conditions
TEMPERATURE
SENSOR CIRCUIT
Temperature sensing
circuit built into the chip
ON CHIP RSSI
Amount of RF power
received by the chip

9. Moisture Sensing
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Water / moisture
detunes the antenna
Chip automatically adjusts
internal capacitance to match
the detuned antenna
Sensorvalue
Time
Degree of capacitance
adjustment is reflected
as the sensor value

10. Moisture Sensing
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Internal capacitance
changes even more
Sensorvalue
Time
Further change in
sensor value
More water / moisture
detunes the antenna
further

11. Moisture Sensing
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Sensorvalue
Time

12. Proximity Sensing
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Chip adjusts internal
capacitance to match the
detuned antenna
Sensorvalue
Time
Change in sensor value
Metallic / high
detuning material

13. Proximity Sensing
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Sensorvalue
Time

14. Proximity Sensing
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Sensorvalue
Time

15. Pressure Sensing
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Metallic foil material
Compressible foam
material
Sensor Tag

16. Pressure Sensing
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PRESSUREPRESSURE
Metallic foil moves
closer to the antenna,
detuning it
Foam material
compresses
PRESSURE
Sensorvalue
Time
Change in sensor value
Higher pressure will
compress the foam
more, bringing the
metal foil even closer

17. Temperature Sensing
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Temperature
Time
Temperature circuit resides in the
chip itself, sensor output reflects
the silicon die temperature

18. How Does a Reader Read Sensor Values?
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Reader issues
inventory command
Tag receives power, and
continuously writes its
sensor value into its own
memory
Tag replies its EPC
Reader requests data
at sensor memory
location
Tag replies memory
location data (sensor
value)
READER TAG

19. SMARTRAC Moisture Sensor Products
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SENSOR DOGBONE SENSOR PATCH SENSOR TADPOLE
AND MORE…
General purpose
moisture detection
Diaper and fabric
moisture detection
On-metal moisture detection

20. Sensor Tadpole
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Voted “Best New Product” at RFID Journal Live! 2016
Application video: https://www.youtube.com/watch?v=0LNfwqgQp_M

21. SMARTRAC Temperature Sensor Products
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TEMPERATURE DOGBONE
AND MORE…
Temperature and moisture sensing

22. Possible application areas:
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 Healthcare
 Construction
 Smart packaging
 Oil and gas industry
 Forest & wood industry
 Cold chain
 Smart factory
 Smart home
 Autonomous driving

23. Challenge
Do you want to know your application better, collect
accurate and real time data?
Challenge us to find a suitable sensor solution for
you.
SMARTRAC TECHNOLOGY GROUP
Lauri Hyytinen
Head of Segment Automotive
Mobile: + 358 40 571 9832
E-mail: lauri.hyytinen@smartrac-group.com
Internet: www.smartrac-group.com
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