Worn on your upper arm or chest strap, the sensor captures sweat in real time and uses FLOWBIO’s proprietary Advanced Hydration Intelligence to estimate your sweat rate, water loss, sodium loss and sodium concentration. This helps you understand what your body needs before, during and after exercise, so you can hydrate with more confidence.

Ideal for cycling, running and walking, FLOWBIO is made for athletes who want to avoid dehydration hangovers, cramping, poor recovery, disrupted post-race sleep and empty legs. It works alongside platforms including Garmin, Wahoo, Zwift and COROS, and supports use with your preferred electrolyte brand.

With 100+ hours of battery life, USB-C charging, no subscription fees and a fully reusable design, FLOWBIO is a smart one-time investment for athletes who want accurate, practical hydration data without lab testing or single-use components.

The FLOWBIO Sensor captures sweat through a small micro-channel using the natural pressure from your sweat glands. There are no needles and no skin penetration. As you exercise, the sensor analyses your sweat and uses proprietary algorithms to estimate your total body sweat rate, total water loss, sodium loss and sodium concentration.

Your results are shown in the FLOWBIO App, where raw sweat data is turned into practical hydration guidance. This helps you prepare for upcoming sessions, understand your losses during training, and adjust your recovery afterwards based on your own physiology, effort and environment.