Transmitter
Definition
The reusable electronic component that attaches to a CGM sensor and wirelessly sends glucose data to a smartphone, smartwatch, or dedicated receiver via Bluetooth. Transmitters are typically rechargeable or have a fixed battery life spanning several months. On the Dexcom G7, the transmitter is integrated into the disposable sensor pod, while the Eversense system uses a separate rechargeable transmitter worn over the implanted sensor.
Why “Transmitter” Matters for Glucose Monitoring
Understanding transmitter 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 2 CGM products in our database. Understanding transmitter 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.
A continuous glucose monitor that automatically and continuously transmits glucose readings to a display device — such as a smartphone, smartwatch, or insulin pump — without requiring the user to scan or interact with the sensor.
The required initialization period after inserting a new CGM sensor before it begins delivering glucose readings.