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Freestyle Libre One Sensor

Based on 127 reviews
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Paul Kelly - Medical Content Writer
Paul Kelly
James O'Loan - CEO & Superintendent Pharmacist
James O'Loan
CEO & Superintendent Pharmacist
How we ensure accuracy in our content

The original Freestyle Libre sensor has now been discontinued. Looking to upgrade? Why not try the Freestyle Libre 2 instead.

What is the Freestyle Libre One Sensor?

The Freestyle Libre Sensor is an easy-to-use sensor for testing blood sugar levels for those with diabetes. Instead of the more traditional blood testing method, the Libre doesn’t require any finger pricking to draw blood and instead, the sensor sits on the back of the arm where it can easily be scanned to give you a reading. It can be used for up to 14 days.


How does the sensor work?

This sensor works by placing the Freestyle Libre Reader (sold separately) over the sensor which gives off a reading. It works similar to how a contactless credit/debit card works, with a simple connection to confirm the purchase.


Who is this sensor suitable for?

The Freestyle Libre Sensor is suitable for those with diabetes who have a more active lifestyle and want a faster reading. It is also suitable for those who perhaps don’t want to be constantly pricking their finger for blood.


How is the Freestyle Libre Sensor applied?

The is applied to the skin using the included applicator. To do this, make sure that the skin is clean because oily, wet, or hairy skin may make the sensor harder to apply. Applying the sensor includes several steps:

  • Open up the Sensor Pack and unscrew the cap on it and then put the cap aside.
  • Line up the dark marks on both the sensor and the applicator and press down on the applicator until it stops.
  • Place the applicator over where you want the sensor to go and push down firmly to apply the sensor to the skin. Now the sensor should stick to the skin.
  • Gently pull the applicator away from the sensor, which should stay on the skin.
  • Put the cap back onto the applicator.


How do I shower or bathe when the sensor is on?

If you are showering or bathing, then take extra care. The sensor is waterproof but hard pulling can knock it off, particularly when towelling. The sensor is waterproof for up to 1 metre and can be in the water for up to 30 minutes.


Will the sensor work when I am wearing tight clothing?

No, avoid wearing tight clothing on the arms when using the sensor. Also, take care not to catch the sensor on clothing when getting dressed.


Can I play sports when using the sensor?

You should avoid contact sports that could potentially knock the sensor off the arm. You should also be careful not to bump into things when not doing exercise as this could also knock the sensor off.


Can wear my sensor or CGM device on a plane?

If you wear a Freestyle Libre Sensor or another CGM (continuous glucose monitoring) device, then you may be concerned about taking the sensor through airport security or onto a plane. However, you should be able to take your sensor and other essential products you may need to manage your diabetes. We’d recommend contacting the airport and airline you will be flying with so you can make them aware that you have diabetes and will need to take supplies with you, so they can give you more information about their policies in this area and help you to navigate the airport security process properly when you’re there. You should also carry documentation from your doctor or nurse which explains your condition and further information about the device you’re carrying. For more information about this, you should speak to your doctor or another health care professional.


How do I remove the Freestyle Libre Sensor?

To remove the sensor, use an adhesive remover or use a baby oil such as Johnson’s Baby Oil to help remove the sensor.


Helpful Advice on Medication Restrictions & Addiction

For further information on our medication restrictions policy, please click here

If you are concerned about addiction of 'over the counter' medication we urge you to visit the below links for professional help and advice


Important information

Please note that we CANNOT accept the return of any used Freestyle Libre sensors due to safety and hygiene regulations. This is because the sensors have a needle attachment which could cause harm or spread illness. If you have any problems with your product, please contact our customer services team and they will let you know what to do next.


  • SENSOR SIZE 5 mm height and 35 mm diameter SENSOR WEIGHT 5 grams SENSOR POWER SOURCE 1 silver oxide battery SENSOR LIFE Up to 14 days SENSOR MEMORY 8 hours (glucose reading stored every 15 minutes) SENSOR OPERATING TEMPERATURE 10°C to 45°C SENSOR APPLICATOR AND SENSOR PACK STORAGE TEMPERATURE 4°C to 25°C OPERATING AND STORAGE RELATIVE HUMIDITY 10%-90%, non-condensing SENSOR WATER RESISTANCE IP27: Can withstand immersion into one meter (3 ft) of water up to 30 minutes OPERATING AND STORAGE ALTITUDE -381 meters(-1,250 ft) to 3048 meters(10,000 ft)
Brand Information
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Product Data
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As diabetics can be free from paying VAT on products designed for diabetes, does this apply to the Abbott Freestyle Libre One Sensor that you are selling?

If you have a disability or long-term illness, you may be able to buy some of our products without paying any VAT. The government allows certain products to be zero-rated for VAT purposes (i.e. no VAT needs to be charged) to reduce the cost of the practical products which you may need because of your disability. For freestyle libre, as this product is used for diabetics, we have already removed the VAT from the sales price within the UK

can you please let me know the expiry date for this sensor

Hello. As of today the stock that we hold has an expiry date of at least February 2020.

Does it cost Ј69.99 everytime you replace the sensor?

Yes it does and a sensor last 14 days

How fast is delivery?

48 working hours

How many sensors are in the box?

There is one Sensor in the Box.

If I was to use this how would I see my blood sugars do I need a reader or is there an app?

It seems so! FreeStyle LibreLink is available for iPhone and Android.

Many of the same features of your FreeStyle Libre reader on your phone.

The FreeStyle LibreLink app is approved for use with the FreeStyle Libre Sensor.

Now you can monitor your glucose on your phone without routine fingerpricks.

If we purchase the freestyle Libre via yourselves will Abbott support the device if it was faulty. I am aware if it’s purchased via Amazon you will not have a warranty. Is it the same purchased via yourselves

Due to the device containing a needle we couldn't accept faulty Freestyle Libre back . If you contact Abbott Customer Services Department on 0800 1701177 , they could give you more information on how to return a faulty device to them and whether they will issue a replacement. Thank you

Is Libre link app also included in this price and how many time we can use sensors?

The Libre link app is a simple download via the App Store or google play store. There are a single sensor in each box, each sensor lasts 14 days in total.

Please let me know the expiry date on your freestyle libre sensors at Ј64.99

The current expiry date of our stock is 31-10-2019

What is the content of this box ? Is it only the sensor or sensor plus reader ?

The sensor is 5mm in height and 35mm in diameter.

The portion of the sensor that gets inserted under the skin is less than 0,4 mm wide and it's inserted only about 5mm under the skin.

In a study conducted by Abbott Diabetes Care, users agreed that inserting the sensor was no more painful than a typical finger prick glucose test*.

My granddaughter is 3, how old do you have to be to use FreeStyle Libre

The FreeStyle Libre 1 system is available for children with diabetes, ages 4 years and above

Is the freestyle libre suitable for dogs?

You will need to check with your veterinary surgeon, as freestyle libre have been manufactured for use in humans.

Ask a Pharmacist

Didn't find the answer you were looking for? Submit a private question to be answered by one of our qualified UK pharmacists.

* Name and email address are only captured so you can be emailed a response when your question is answered by a pharmacist. No personally identifiable information is stored or displayed at any time.

Shipping Times

MethodHandling TimeTransit TimeTimescaleApprox Cost
Standard Shipping (3-5 Working Days)n/an/an/a£0.00
Royal Mail Tracked 24n/an/an/a£4.95
Sons Tracked 24n/an/an/a£3.90
Sons Tracked 48n/an/an/a£2.90

Times are given in working days and are approximate. Costs may change based on order total, day of the week or location within the UK. Ability to hit timescales will depend on whether the products are ordered before a cut off time, as well as additional administration time incurred in reviewing your order.

Please review the estimates at the checkout.

Shipping Costs

Free UK Delivery on all orders over £30* - Delivery within 3-5 working days.

Standard UK Delivery - £2.95* - Delivery within 3-5 working days.

Express UK Delivery - £4.95** - Delivery within 1-2 working days.

Temperature Controlled Delivery - £8.85 - Delivery within 1-3 working days.

Please Note: These prices are shown as a guide only. All delivery times are approximate but have been obtained in good faith.

*Excluding refrigerated products and treatments which are subject to different postage charges.


Discreet Delivery

All our items are sent completely discreet for your peace of mind.

This means the packaging is plain, there is no mention of what product is inside your package and there is no mention of Chemist4U either.

We respect that many of our products are of a sensitive nature - this is why we take every step to keep your purchases private.

Returns Information

Customers can read our full returns policy by clicking here

Freestyle Libre One Sensor Reviews

So easy to use, stayed on. delivery within 48 hours of ordering. Perfect. Thank you
Good reliable product easy to use and competitive price too.
Worth every penny, so easy to use. Wouldn't know what I'd do without mine
Great device for monitoring blood/sugar levels. Currently using it on my pet dog under veterinary supervision.
Rosalind Secker,
Have only been using the blood glucose monitor for a couple of days but it seems to be doing the job. A very good way to see which foods cause sugar spikes and then be able to alter diet accordingly.

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