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 our Companion App, offering recovery and preparation suggestions and tips to optimise your performance.



We provide you with the following metrics through the FLOWBIO System:

• Total body sweat rate per hour (in L/hr or oz/h)
• Total body water loss (in litres or ounces)
• Total body sodium loss (in grams our ounces)
• Total body sodium concentration (mg/L or mg/oz)

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 is swim-friendly with an IP65 rating. However, currently, swimming won't provide sweat rate and sodium loss data as this is still in development.

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.

The battery life is 100+ hours and the device can be charged using a USB-C cable.

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 23 mg 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 request our whitepaper here.

We don’t charge any subscriptions or monthly costs to use the FLOWBIO System

The FLOWBIO System will be compataible with Android mid-April 2025

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:

• Garmin
• Wahoo
• Zwift
• Coros

While we acquire data live and in real-time, we haven't developed live integrations yet. The Sensor doesn't currently stream live data to your Garmin, but we anticipate launching this feature later this year.

The device is entirely reusable with no single-use components. To maintain accuracy and functionality, a sporadic and simple rinse under a tap is all that's required.

No, the Sensor does not have a needle. We collect sweat through a tiny channel using the pressure exerted by your sweat glands.