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Search and find answers to frequently asked questions about FreeStyle Libre systems. 

Why do the numbers on the Sensor pack and Sensor applicator need to match?

The Sensor pack and Sensor applicator need to match because the Sensor is factory calibrated. Information about the calibration of the sensing element (also known as the Sensor tip) is programmed in the Sensor at the factory and these two components must be used together.

 

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