System Specifications
Sensor glucose assay method
Amperometric electrochemical sensor
Sensor glucose reading range
40 to 500 mg/dL
Sensor size
5 mm height and 35 mm diameter
Sensor weight
5 grams
Sensor power source
One silver oxide battery
Sensor data
Up to the wear duration specified in your Sensor Kit's product insert
Sensor memory
8 hours (glucose readings stored every 15 minutes)
Operating temperature
50 °F to 113 °F
Sensor Applicator and Sensor Pack storage temperature
39 °F to 77 °F
Operating and storage relative humidity
10-90%, non-condensing
Sensor water resistance
IP27: Can withstand immersion into 3 ft (one meter) of water for up to 30 minutes. Protected against insertion of objects > 12 mm diameter
Operating and storage altitude
-1,250 ft (-381 meters) to 10,000 ft (3,048 meters)
Please refer to the Reader Kit User's Manual for updates to the information.
Blood glucose assay range
20 to 500 mg/dL
Reader size
95 mm x 60 mm x 16 mm
Reader weight
65 grams
Reader power source
One lithium-ion rechargeable battery
Reader battery life
7 days of typical use
Reader memory
90 days of typical use
Reader operating temperature
50 °F to 113 °F
Reader storage temperature
-4 °F to 140 °F
Operating and storage relative humidity
10-90%, non-condensing
Reader moisture protection
Keep dry
Operating and storage altitude
-1,250 ft (-381 meters) to 10,000 ft (3,048 meters)
Reader display timeout
60 seconds (120 seconds when test strip is inserted)
Radio Frequency
Near Field Communication* (13.56 MHz RFID); ASK Modulation; 124 dBuV/m; 1.5 inch communication range
Data port
Micro USB
Minimum Computer Requirements
System must only be used with EN60950-1 rated computers
Mean service life
3 years of typical use
Reader cleaning and disinfection
The Reader has a mean use life of 3 years, which is 156 cleaning and disinfection cycles (1 cycle per week for 3 years).
Power Adapter
Abbott Diabetes Care PRT25611 Operating temperature: 50 °F to 104 °F
USB Cable
Abbott Diabetes Care PRT21373 Length: 37 inches (94 cm)
Please refer to the Reader Kit User's Manual for updates to the information.
*Security measures: The communication between Reader and Sensor is a short range near field communication method making it difficult to interfere with or intercept data that is being transferred. The Sensor and Reader are protected by proprietary data format, memory mapping, and cyclic redundancy check (CRC) generation and verification of data.
Quality of Service (QoS): QoS for the FreeStyle Libre 14 day Reader and Sensor wireless communications using the near field communications is assured within the effective range of 4 cm between the Sensor and Reader that is specified to occur within 15 seconds.
