The FLOWBIO Sensor measures your real-time fluid and sodium loses during exercise. Combined with the FLOWBIO app, AHi (Advanced Hydration Intelligence) delivers an end-to-end hydration system so you can perform at your best - knowing what to drink, when, and why.
We're temporarily sold out, but you can buy from our retail partners.
The FLOWBIO Sensor measures fluid and sodium loses continuously throughout exercise. Combined, these give a real-time picture of loses, the data point that varies most between athletes and between sessions.
Sweat rate and sodium concentration are influenced by environmental temperature, exercise intensity, heat acclimation status, and individual physiology. A single session produces a unique loss profile. The sensor captures that profile as it unfolds rather than estimating it from population averages.
Yes. Your FLOWBIO Sensor streams live fluid and sodium loss directly to the Wahoo ELEMNT ACE, BOLT 3 and ROAM as a native data field, in the same view as power, pace and heart rate, so you can adjust your intake during the ride rather than after it. It works with your existing sensor via a firmware update, at no additional cost. Support for Garmin, COROS and Suunto follows later this year.
If you haven't yet received an invite to set up the feature, please contact team@flowbio.com
The FLOWBIO Sensor's accuracy has been established in an independent, peer-reviewed validation study led by CEPS Montpellier. Sensor measurements were compared directly against laboratory gold standard reference methods the same standards used in sports science research settings.
The full methodology and dataset are published and publicly available. View the study here.
Athletes who care about hydration & already train with structured data: cyclists, triathletes, and runners who work from power, pace, and heart rate and understand that gains in hydration can affect output, recovery, and consistency.
Also sports scientists, coaches, performance directors, and nutritionists who use FLOWBIO in applied programmes, including teams competing at World Tour, T100, and professional triathlon level.
Please note that prices shown for customers from outside the UK exclude VAT or relevant import duties. It the responsibility of the customer to pay import duites.
A resting or single-session sweat test gives you one number. FLOWBIO adds a new signal. Continuous sweat data, captured every 8 seconds, for the entire session or race.
THE FLOWBIO SENSOR
Sweat composition changes as you train or race. FLOWBIO samples every 8 seconds throughout the entire session, capturing shifts a single snapshot misses entirely. It analyses and decodes your sweat as intensity and temperature change.
RESTING SWEAT TEST
One number, taken at rest. Pilocarpine-stimulated tests estimate sodium from a small skin site, before you've even started exercising. As science and studies have shown, sweat rate is dynamic and can change from session-to-session.
single use patches
One snapshot, one workout. Patches require careful timing to avoid under collection or saturation. Results depend heavily on correct placement and handling. They provide an average value over a short window and cannot capture how sweat loss changes during a session.
The first complete hydration platform for endurance athletes. Plan it, measure it live, recover from it. Before, during and after every session
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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FROM WORLD TOUR, T100, IRONMAN, UTMB
"Great service, responsive costumer service, quick shipping and just a great tool for hydration tracking".
Toms SkujiņšLatvian & LIDL-TREK Professional Cyclist
“For me it’s the best product on the market for practicality. The data it gives me means I don’t guess my hydration and it reacts to the environments I train and race in”.
SAM DICKINSONOlympian & Professional Triathlete
"The sodium plan, thanks to FLOWBIO, had worked and thankfully did not suffer from any cramps.I am changing the way I race with a better understanding of sweat and sodium losses with the sensor."
Kristjan ChapmanProfessional Ultra Runner
"I am loving the real-time data that I now have on my Wahoo device. It is making a huge difference to my hydration and fuelling strategy having that reminder right in front of me".
Ellie SalthouseProfessional Triathlete
"Best sweat sensor on the market. So easy to use,and easy to read the data. As a professional athlete, I can’t train without it."
Chiara TeocchiPro Cyclist BH Coloma Team
Yes. Your FLOWBIO Sensor streams live fluid and sodium loss directly to the Wahoo ELEMNT ACE, BOLT 3 and ROAM as a native data field, in the same view as power, pace and heart rate, so you can adjust your intake during the ride rather than after it. It works with your existing sensor via a firmware update, at no additional cost.
If you haven't yet received an invite to set up the feature, please contact team@flowbio.com
The real-time stream of sweat data to Garmin watches and bike computers is currently undergoing internal testing and will be released to beta later this summer. If you would like to join the testing team for this, please contact roel@flowbio.com
Yes, we ship globally but we also have retailer partners around the world. 🇺🇸 United States: The Feed. 🇦🇺 Australia: Aid Station. 🇦🇪UAE: Wolfi's. 🇪🇺 Europe Sportbenzin
The Sensor captures your sweat and analysis its contents. Proprietary algorithms use the sensor data to estimate your sweat rate and sodium loss. The data is shown on the FLOWBIO App, offering recovery and preparation suggestions and tips to optimise your performance.
Our latest data has indicated that we are 90% accurate in lab based conditions. In the field we achieve accuracies up to 83% for our sodium with as little as 180mg difference (that is 6x less than a pinch of salt). Our fluid loss is 73% accurate with as little as 250mL difference to in-field gold standards. If you are interested in learning more about the accuracy of the system behind the Sensor, you can view the validation study here.
This work comes from a globally respected group in exercise hydration and thermophysiology, including Yannis Pitsiladis and Sébastien Racinais, who have shaped international guidelines on heat stress and athlete safety. The research was conducted across elite applied physiology centres such as CREPS Montpellier and Université de Montpellier, both known for rigorous heat and sweat research with real athletes. These groups are trusted for gold-standard methodology and for translating lab science into practical performance guidance.
Please note that prices shown for customers from outside the United Kingdom exclude VAT or relevant import duties. For customers in the UK, VAT is added at checkout.
Currently, data from the Sensor is accessible only during cycling, running or walking activities. We plan to expand and include other sports as we grow. If you are interested in using our Sensor for a different modality please get in touch here.
The Sensor is designed to be worn on an existing heart rate monitor. We support both optical arm-based monitors and chest straps, offering flexibility in wearing the Sensor either on the upper arm or on your back.
The Sensor measures your sweat rate and sodium loss, helping you optimise your recovery and prepare for training and events by ensuring you replace and bring the necessary fluid and electrolytes.
You can exercise without your phone nearby, but for syncing the Sensor and viewing your data, having your mobile device is essential.
At present, using the FLOWBIO System requires a fitness tracker integrated with the Companion App. We currently support the following integrations:
