AC excitation prevents probe polarization, delivering stable TDS readings over time. TDS Meter V1.0 Development Board is designed to measure total dissolved solids in water systems with reliable performance and easy integration into projects. Wide voltage operation from 3.3V to 5.5V plus a 0-3.3V analog output makes the board compatible with both 5V and 3.3V control systems, simplifying connection to common microcontrollers. Waterproof probe is submersible, enabling long-term measurement in liquids with minimal maintenance. Key benefits - Accurate TDS measurement with reduced probe polarization drift - Flexible power options for varied platforms - Easy integration using standard 0-3.3V analog output - Durably submersible probe for continuous monitoring Typical applications - Home or small lab water quality checks to monitor drinking water and filtration performance - Industrial process or cooling water monitoring to ensure TDS remains within specification - Agricultural systems such as hydroponics or fertigation where monitoring nutrient concentration is important