Flash Glucose Monitoring System Sensor 1s | FreeStyle LibrePRODUCT DETAILS 1 Sensor The FreeStyle Libre sensor automatically measures and continuously stores glucose readings day and night. The sensor updates up to every minute and stores up to 8 hours of glucose readings in minute intervals. It can be worn up to 14 days. Sensor life: up to 14 days Size: 5 mm height and 35 mm diameter Weight: 5 grams Memory: 8 hours (glucose readings stored every 15 minutes) Water resistance: IP27 can withstand immersion into