Sensor Warmup
Definition
The required initialization period after inserting a new CGM sensor before it begins delivering glucose readings. Warmup times vary by device: the Dexcom G7 requires approximately 30 minutes, the FreeStyle Libre 3 requires 60 minutes, and older models like the Dexcom G6 required up to 2 hours. During warmup, the sensor stabilizes in interstitial fluid and the device runs internal calibration algorithms.
Why “Sensor Warmup” Matters for Glucose Monitoring
Understanding sensor warmup is essential for anyone using or evaluating a continuous glucose monitor. This concept directly affects how CGM devices are designed, how glucose data is interpreted, and how clinical decisions about blood sugar management are made. The technical foundations of CGM technology determine the accuracy, reliability, and user experience of every device on the market — from the Dexcom G7 to over-the-counter options like the Abbott Lingo.
This term is particularly relevant to 3 CGM products in our database. Understanding sensor warmup helps you compare devices more effectively and choose the right continuous glucose monitor for your specific needs.
Related Terms
A wearable medical device that tracks glucose levels in interstitial fluid 24 hours a day through a tiny sensor inserted just under the skin.
The process of verifying and adjusting CGM accuracy by comparing a sensor reading against a traditional fingerstick blood glucose measurement.
The fluid that surrounds cells in body tissue, where CGM sensors measure glucose concentration.