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Creating a comprehensive paper on the XH-M203 schematic involves delving into the specifics of its design, application, and the theory behind its operation. This document serves as a basic guide and can be expanded with further details, diagrams, and practical examples for a more thorough analysis.

When the water level drops below the "Low" sensor, the relay triggers the pump. It stays on until the water reaches the "High" sensor, at which point the relay cuts power to the pump. Power Supply: