How to Insert and Activate a Freestyle Libre 2 Sensor

Insert and Activate a Freestyle Libre 2 Sensor


The Freestyle Libre 2 sensor is a revolutionary device designed to simplify glucose monitoring for individuals with diabetes. This comprehensive guide will walk you through the process of inserting and activating a Freestyle Libre 2 sensor, ensuring a smooth and hassle-free experience. Here are the following instructions to insert and activate a Freestyle Libre 2 Sensor.

Section 1: Understanding the Freestyle Libre 2 System

1.1 What is Freestyle Libre 2?

Freestyle Libre 2 is a continuous glucose monitoring (CGM) system that allows individuals with diabetes to monitor their blood glucose levels in real time. The system consists of a small sensor and a reader, providing a convenient alternative to traditional fingerstick testing.

1.2 Key Features of Freestyle Libre 2

  • Continuous Glucose Monitoring: Freestyle Libre 2 provides continuous, real-time glucose monitoring without the need for frequent fingerstick tests.
  • Optional Alarms: The system offers customizable high and low-glucose level alarms to alert users of potential fluctuations.
  • Trend Arrows: Users can view trend arrows, indicating the direction and rate of glucose level changes.
  • Data Storage: The system stores glucose data for up to 90 days, allowing users and healthcare professionals to track patterns over time.

Section 2: Preparing for Sensor Insertion

2.1 Gather Necessary Supplies

Before beginning the insertion process, ensure you have the following supplies:

2.2 Check Expiry Date

Verify the expiration date on the sensor packaging to ensure its efficacy. Using an expired sensor may result in inaccurate glucose readings.

2.3 Clean the Insertion Site

Thoroughly clean the insertion site with an alcohol swab to minimize the risk of infection.

Section 3: Inserting the Freestyle Libre 2 Sensor

3.1 Choose an Appropriate Site

Select a site for sensor insertion, typically on the back of the upper arm. Avoid areas with prominent veins, moles, or scar tissue.

3.2 Peel Back the Sensor Applicator

Remove the sensor applicator from its packaging and peel back the adhesive cover to expose the insertion needle.

3.3 Apply the Sensor

Position the sensor applicator on the selected site and firmly press down to insert the needle. The sensor’s adhesive will secure it in place.

3.4 Remove the Applicator

Gently pull the applicator away from the skin, leaving the sensor in place. Discard the applicator correctly.

Section 4: Activating the Freestyle Libre 2 Sensor

4.1 Power On the Reader

Power on the Freestyle Libre 2 reader by pressing the designated button.

4.2 Navigate to the Sensor Activation Menu

Access the sensor activation menu on the reader. This can usually be found in the settings or sensor options.

4.3 Scan the Sensor

Hold the reader near the sensor, ensuring proper alignment. The reader will automatically scan and activate the sensor.

4.4 Confirm Activation

Once the scanning process is complete, the reader will display a confirmation message indicating successful sensor activation.

Section 5: Post-Insertion Care

5.1 Wait for Initialization

Allow the sensor a few hours to initialize and start providing accurate glucose readings. During this time, refrain from strenuous activities that could potentially dislodge the sensor.

5.2 Monitor Readings

Regularly check the reader for glucose readings and trends. Familiarize yourself with the various features and settings on the reader to make the most of the Freestyle Libre 2 system.

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5.3 Troubleshooting Tips

If you encounter any issues with the sensor or readings, refer to the troubleshooting section in the user manual. Typical issues may include sensor dislodgement or communication errors.


Successfully inserting and activating a Freestyle Libre 2 sensor is a crucial step toward effective diabetes management. By following this comprehensive guide, you can navigate the process with confidence. And you are ensuring accurate and continuous glucose monitoring. Remember to consult with your healthcare professional for personalized guidance and support throughout your diabetes management journey.