The Sweat Sodium Monitor is a non-invasive, strip-based colorimetric sensing platform designed to detect sodium levels in human sweat. By integrating a custom photodiode-optical module with the Kubelka-Munk theory, the system eliminates subjective interpretation of test strips, offering automated, quantitative analysis for early detection of electrolyte imbalances.
Provides an early warning system for Hyponatremia and Hypernatremia—critical for elderly patients and those with chronic heart or kidney disease—without the pain of needles or blood draws.
Enables real-time hydration tracking. By monitoring sweat sodium loss during intense activity, athletes can prevent muscle cramps and neurological dysfunction caused by severe electrolyte depletion.
Sweat analysis is plagued by environmental interference. Small samples evaporate rapidly, causing falsely high concentration readings. Additionally, ambient light leakage and variable sample volumes often render low-cost colorimetric strips inaccurate outside of controlled lab settings.
Unlike standard wearables, this device features Dynamic Environmental Integration. It combines sodium colorimetry with live temperature and humidity sensing to mathematically correct for evaporation effects in real-time. The system uses the Kubelka-Munk equation to translate raw light reflectance ($R$) into precise concentration values ($K/S$), bridging the gap between paper strips and digital precision.
The solution is a Multi-Modal Biosensing Platform built on three pillars:
Real-Time Latency
Simulation Accuracy
Optical Analysis
The system leverages C++ for ESP32 firmware, HTML/JS for the embedded web interface, and Python for validating the Kubelka-Munk simulation models. The enclosure was designed in CAD and fabricated using PLA (Polylactic Acid).