

FreeStyle Libre 3 Plus Sensor
- Small, discreet sensor worn on your arm
- Optional alarms help you spot highs and lows sooner
- Removes the need for routine finger-prick testing
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FreeStyle Libre 3 Plus - Available Online
The FreeStyle Libre 3 Plus continuous glucose monitoring sensor helps you spot trends, highs, and lows without routine finger-prick tests. It sends real-time glucose readings to your smartphone every minute, giving you full visibility into your diabetes management.
Who Is FreeStyle Libre 3 Plus Sensor Suitable For?
FreeStyle Libre 3 Plus Information
What Is the FreeStyle Libre 3 Plus?
The FreeStyle Libre 3 Plus is a continuous glucose monitoring sensor. It measures glucose levels in the interstitial fluid, which is the fluid that surrounds your body’s cells, beneath your skin when worn on the back of your arm. It sends measurements to your phone every minute and provides up to 15 days of round-the-clock readings.
Can I Use FreeStyle Libre 3 Plus?
The FreeStyle Libre 3 Plus may be suitable for you if you have type 1 or type 2 diabetes and are looking for a way to easily monitor your glucose levels. You need a smartphone or an optional reader to connect the sensor.
How Does FreeStyle Libre 3 Plus Work?
Each FreeStyle Libre 3 Plus contains a small filament that sits in the interstitial fluid just under your skin. It measures glucose levels in the fluid and sends readings to your app or optional reader every minute. This allows you to view trends and history, and set optional alerts if your levels are out of range.
Alternatives to FreeStyle Libre 3 Plus
If the FreeStyle Libre 3 Plus isn’t the best choice for your situation, other options exist.
These include:
- Dexcom ONE+
- FreeStyle Libre 2 Plus
What’s Included in the Box
Each FreeStyle Libre 3 Plus pack includes the components needed to set up and use the sensor.
How To Use the FreeStyle Libre 3 Plus
Clean and dry the back of your upper arm. Apply the sensor using the applicator provided in the box. Start the sensor with the app or optional reader. After a 60-minute warm-up period, you will see your glucose readings every minute on the device you connected it to.
Side Effects
Like all medical devices, this sensor may cause side effects.
Side effects that you may experience can include:
- Mild skin irritation or redness
- Itching where the sensor is applied
- Discomfort when you first apply it
These are usually short-lived and aren’t serious.
Warnings
There are situations that may make readings less reliable. They include:
- Taking more than 1000mg of vitamin C per day
- Not applying the sensor correctly, so it comes loose
- Storing the sensor at temperatures outside of the recommended range
The first 12 hours after applying the sensor can also lead to less reliable readings, so if your symptoms don’t match what the sensor is saying, always carry out finger-prick tests to confirm.
FreeStyle Libre 3 Plus FAQs
What is the difference between FreeStyle Libre 3 and FreeStyle Libre 2 Plus?
While the 2 Plus sensor is small and discreet, the FreeStyle Libre 3 Plus is even smaller, comparable to the size of a £1 coin. The 3 Plus can automatically send readings to the reader and your smartphone, whereas the 2 Plus can only send them to your smartphone. The 2 Plus stores sensor data for eight hours, whereas the 3 Plus stores it for 15 days.
Is FreeStyle Libre 3 Plus being discontinued?
No, the FreeStyle Libre 3 is being phased out and replaced by the FreeStyle Libre 3 Plus, which features an upgraded sensor. These next-generation sensors offer improved features and performance over the original sensors.
Is FreeStyle Libre 3 Plus available in the UK?
Yes, the FreeStyle Libre 3 Plus is available in the UK, either on the NHS or via a self-funded pathway. If you’re eligible for it on the NHS, you’ll need a prescription from an NHS prescriber. If you’re not eligible and want to go down the self-funded route, you’ll need to order it through an official UK stockist like The Independent Pharmacy.
Is FreeStyle Libre 3 Plus worth upgrading from FreeStyle Libre 2 Plus?
It may be worth upgrading from the FreeStyle Libre 2 Plus to the FreeStyle Libre 3 Plus if you prefer a slightly smaller device. Which is right for you depends on your needs and how you manage your glucose.
How often should I replace my FreeStyle Libre 3 Plus sensor?
Each sensor lasts up to 15 days. You should remove the old sensor and apply a new one after this time. The app or reader will tell you when it’s time to replace the sensor. It’s a good idea to switch arms each time to reduce the risk of skin irritation.
Is a prescription needed for FreeStyle Libre 3 Plus?
If you’re eligible for the FreeStyle Libre 3 Plus on the NHS, then you will need a prescription to obtain it. However, if you’re planning on self-funding, you won’t need one. This means you’re paying for the sensors yourself. To do this, you can purchase them from an official UK stockist, such as The Independent Pharmacy.
How accurate is FreeStyle Libre 3 Plus?
The sensor has been clinically tested and shown to provide accurate, reliable glucose readings. You can safely use the information it provides to make informed treatment decisions for your diabetes.
Does FreeStyle Libre 3 Plus need finger-prick tests?
The FreeStyle Libre 3 Plus sensor typically eliminates the need for routine finger-prick testing. But, if your symptoms don’t match up with what the sensor is telling you, it’s always best to do a finger-prick just to confirm the readings.
Which is more accurate, finger-prick testing or the FreeStyle Libre 3 Plus sensor?
Finger-prick testing gives a single glucose reading at one moment in time. The FreeStyle Libre 3 Plus sensor continuously measures glucose throughout the day and night, allowing you to see patterns, trends and changes over time.
Finger-prick tests are still useful if you need to confirm a reading, but continuous monitoring can give a broader view of how your glucose levels behave.
Related Treatments
Dexcom ONE+ Continuous Glucose Monitoring (CGM) System£34.99- Out Of Stock

FreeStyle Libre 2 Plus Sensor
FreeStyle Libre 2 Plus Sensor£51.99
Visit our Diabetes (Type 2) page for treatments, advice and FAQs.
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