Dexcom latest sensor, the Dexcom G7 15 Day, is a continuous glucose monitor (CGM) designed for adults living with type 1 or type 2 diabetes 18 years and older. It is the next generation of the original 10-day G7 (for ages 2+), building on that foundation with an extended wear time, a new algorithm, and a claimed accuracy improvement over its predecessor.

The sensor measures glucose levels every 5 minutes through interstitial fluid and features a 15-day wear period with a 12-hour grace period—a 50% longer weartime the original G7. It includes a 60-minute warm-up period, is waterproof, and has a measured accuracy, or MARD, of 8%.

While this is Dexcom's longest-lasting CGM sensor to date, the company has disclosed that 73.9% of sensors will complete the full 15-day wear time, meaning roughly 26% may not last the entire period.

Our founder, Justin Eastzer wore four sensors over two months to put the G7 15 Day to the test. In our video review, he covers the sensor's features and alert customization options, real-world wear duration, adhesive quality over time, and connectivity reliability throughout the wear period. He also pusts the 10-day and 15-day sensors head-to-head and compares both readings to a blood glucose meter.

On the compatibility front, the G7 15 Day currently works with Omnipod 5 and the Beta Bionics iLet for automated insulin delivery, with Tandem and other pump compatibility in the works.

Watch the full review with the video above to find out all the details and for more—we will be posting a detailed writen review for our All Access members next week, so stay tuned!

Disclaimer: Diabetech content is not medical advice—it’s for educational purposes only. Always consult with a physician before making changes to your healthcare.