| Sensor Wear | 14 days |
| Warm-Up Time | 60 minutes |
| Glucose Range | 2.2β27.8 mmol/L |
| Water Resistance | IP27 (1m, 30 min) |
| Alarm System | Optional high/low/signal loss |
| Age Approval | 4 years and older |
| Calibration | Factory calibrated |
Key Takeaways
- 14-day sensor wear with 1-hour warm-up period
- Optional real-time glucose alarms (high & low)
- No routine fingerstick calibration required
- Compatible with smartphones and dedicated reader
- Approved for ages 4 and up
What Is the FreeStyle Libre 2?
The FreeStyle Libre 2 is Abbott's second-generation flash continuous glucose monitoring (CGM) system. It measures interstitial glucose every minute and transmits readings to a compatible device, providing a comprehensive picture of glucose trends without routine fingerprick tests. Launched as a significant upgrade over the original Libre, the Libre 2 adds Bluetooth-enabled real-time optional alarms β a critical safety feature for hypoglycemia and hyperglycemia awareness.
Key Specifications
| Feature | Detail |
|---|---|
| Sensor Wear Duration | 14 days |
| Warm-Up Time | 60 minutes |
| Measurement Range | 2.2β27.8 mmol/L |
| Scanning Method | NFC scan or Bluetooth automatic |
| Water Resistance | IP27 β up to 1m for 30 min |
| Alarm System | Optional high/low/signal loss alerts |
| Compatible Ages | 4 years and older |
| Calibration | Factory calibrated β no fingersticks required |
How It Works
The Libre 2 sensor is applied to the back of the upper arm using a one-touch applicator. A tiny flexible filament sits just beneath the skin, measuring glucose in interstitial fluid. Readings are transmitted via NFC (scan-to-read) or automatically via Bluetooth when alarms are enabled. Data is displayed on the FreeStyle LibreLink app or the dedicated FreeStyle Libre 2 reader, showing current glucose, a trend arrow, and an 8-hour history graph.
Optional Alarms β A Major Upgrade
Unlike its predecessor, the Libre 2 includes configurable glucose alarms that alert users without needing to actively scan. These include:
- Low Glucose Alarm: Triggers when glucose falls below a user-set threshold
- High Glucose Alarm: Alerts when glucose exceeds a set upper limit
- Signal Loss Alarm: Notifies if the sensor connection is interrupted
Alarms are delivered to your smartphone or reader, making this system especially valuable for overnight safety and parents monitoring children.
FreeStyle Libre 2 vs Libre 3
| Feature | Libre 2 | Libre 3 |
|---|---|---|
| Wear Duration | 14 days | 15 days |
| Sensor Size | Standard | Smallest CGM available |
| Real-Time Readings | Scan or alarm-triggered | Continuous automatic |
| Cost | More affordable | Premium pricing |
Who Should Use FreeStyle Libre 2?
- Type 1 and Type 2 diabetes patients wanting fingerstick-free monitoring
- Parents managing glucose in children aged 4+
- Patients at risk of hypoglycemia who need alarm alerts
- Anyone switching from traditional blood glucose meters
Application & Placement Tips
Apply the sensor to clean, dry skin on the back of the upper arm. Rotate sites each wear cycle. Avoid areas with excessive hair, scarring, or frequent movement. Press the applicator firmly until you hear a click, then remove slowly. The sensor should sit flush with the skin for optimal adhesion and accuracy.
Where to Buy
MDS Diabetes stocks the FreeStyle Libre 2 Sensor (1-Pack) with fast dispatch and competitive pricing, making it easy to maintain your supply without interruption.