タイトルまたは説明

How the FreeStyle Libre works

The FreeStyle Libre works by having a small round sensor applied to your arm.

The sensor is a round disc, 5mm high and *5mm diameter, making it roughly the size of a £2 coin.

The sensor is applied to the skin with a handheld applicator and then lasts for *4 days. Most people that were used in patient trials of the Libre rated the application of the sensor as being painless.

Within the *4 days of usage, the sensor allows you to scan the sensor with the handset which sends data of your sugar levels over the previous 8 hours to the Libre systems handset.

When you scan, you therefore get not just a glucose reading, as you would with a blood glucose meter, but can also see whether your sugar levels are starting to go up, down or are stable.

Technical specifications (reader)

• Radio frequency: *3.*6 MHz
• Data port: Micro USB
• Blood glucose measurement range: 1.1 to *7.8 mmol/L
• Blood ketone measurement range: 0.0 to 8.0 mmol/L
• Battery: 1 lithium-ion rechargeable battery
• Battery life: 7 days typical usage between charging
• Service life: 3 years of typical use
• Dimensions: *5 x *0 x *6 mm
• Weight: *5 g

Operating and storage ranges

• Operating temperature: *0° to *5°C
• Storage temperature: **0° to *0°C
• Altitude: ***1 m (*1,**0 ft) to 3,**8 m (*0,**0 ft)

Technical specifications (sensors)

• Memory: 8 hours (*2 readings)
• Sensor life: Up to *4 days
• Battery: 1 silver oxide battery (lasts the life of the sensor)
• Dimensions: *5 mm diameter and 5 mm height
• Weight: 5 g