Price: $189.00
(as of Jun 01, 2026 23:50:30 UTC – Details)
From the brand
Nix Biosensors
The first biosensor to analyze sweat and provide personalized hydration data — scientifically validated and delivered in real time.
Revolutionary Sweat Science
The Nix Hydration Biosensor pairs via Bluetooth to the free Nix Solo app and provides personalized hydration data to your phone, smartwatch, or bike computer. Our sensor continuously measures fluid and electrolyte losses through the duration of a workout and tells you when, what, and how much to drink providing real-time, actionable data. Nix also provides predictive sweat data, priming recommendations, and recovery insights.
Personalized Hydration Data
Real-time, actionable hydration data and alerts including total fluid losses, electrolyte and sodium losses, and replenishment needs.
Actionable Hydration Insights
Individual insights include predicted hydration needs, recovery strategy, environmental data, beverage recommendations and more.
Nix Solo Calculators
5 free in-app calculators help you identify your predicted hydration needs, recommended priming protocol, recovery strategy, and more.
Can I Wear This Around the Clock?
No. Since our device is sweat-powered, you must be sweating in order to receive accurate and actionable data.
Can I Reuse a Sweat Patch?
You cannot use the same Sweat Patch for multiple workouts. A new Sweat Patch must be applied at the start of each workout. Once sweat has already moved through the flow path on the back of the patch, it cannot be worn again to start a new workout.
Are There Any Needles?
No. The pod clips on to the sweat patch and sticks to the surface of the skin. It is a completely non-invasive adhesive.
Real-Time Hydration Data & Alerts – Stay optimally hydrated with real-time, personalized data and notifications sent directly to your phone, watch, or bike computer. Nix’s hydration monitor analyzes your sweat as you train, quantifying exactly when, what, and how much to drink for peak performance. The perfect fitness tracker for endurance athletes training for their next marathon, Ironman or triathlon.
Sweat-Powered, Science-Backed Performance – Nix is the first biosensor to scientifically analyze sweat and deliver real-time hydration insights. Track your fluid, electrolyte, and sodium losses using your own biomarkers – no needles, no pricks, just a single-use adhesive patch that works only when you’re actively sweating. It requires as little as 4.5 microliters of sweat to obtain a reading.
Advanced App Features & Hydration Calculators – The free Nix Solo app connects via Bluetooth and gives you deep hydration analytics: sweat composition, environmental conditions, activity tracking, and custom drink inputs. Plus, use five in-app calculators (Custom Drink, Recovery, Race Day, Predictive, and Priming) for pre workout and post workout tailored hydration guidance. Available in multiple languages, including Spanish, French, and Portuguese. Compatible with iOS and Android devices.
Designed for Serious Training & Race Prep – Perfect for endurance sessions 45+ minutes long runs, cycling (indoor or outdoor), brick workouts, or race training. The rechargeable Nix Pod clips onto a new single-use patch each session. With up to 36 hours of battery life, over 70% of Nix users rely on it for endurance prep. Seamlessly integrates with Garmin smartwatches, Apple Watch, and Garmin bike computers.
Complete Starter Kit & Athlete-Trusted Tech – The Nix Hydration Biosensor Starter Pack includes 1 rechargeable Pod, 1 Sweat Patch Refill (4 patches), 1 charger case, and 1 USB-A to USB-C cable. Used by elite athletes across the NBA, NFL, NHL, MLB, PGA, Olympians, and Ironman competitors.
Electrolytes, Fueling & Dehydration Insights – The Nix Hydration Biosensor helps you understand your body’s unique hydration needs by tracking real-time fluid and electrolyte loss. Use your personalized data to choose the right electrolyte mix and fueling strategy, prevent dehydration, muscle cramps, and fatigue—so you can train longer, race stronger, and recover smarter.