Hydrosense: New wearable tracks fluid and electrolyte loss by analysing sweat

Nowadays, even budget-friendly wearables can track a wide range of health metrics, such as heart rate and blood oxygen levels. Some Garmin smartwatches can also estimate sweat loss during exercise by factoring in effort and ambient temperature.

The Hydrosense AI Sweat Sensor is a new wearable designed to provide hydration data based on actual measurements. According to its manufacturer, the device uses colorimetric technology to directly analyse sweat, allowing users to monitor their fluid and electrolyte loss in real time. The sensors are single-use and only last four hours. Even at its early bird price of $149 for a pack of ten sensors, the Hydrosense seems rather expensive. Potential buyers should also consider the financial risks inherent in backing a crowdfunding campaign.

Given the system’s relatively high price, users might want to measure their fluid loss once for specific exercise types and intensities, and then use the data obtained as a reference for future workouts. The Hydrosense also comes with a companion app that displays hydration status and offers personalised recommendations for fluid intake. As a practically free alternative, weighing yourself before and after a workout remains a simple and common way to estimate fluid loss.