1.
Low Level (Empty Tank): The space inside the tank opposite the probe is filled with air. Air has a very low dielectric constant, so the system's capacitance value (C1) is small. 2.
Water Reaches Detection Point: When water rises to the height of the sensor probe, water (with a much higher dielectric constant than air) replaces the air. This causes the system's capacitance value to jump significantly to a higher value (C2). 3.
Intelligent Chip Trigger: The sensor's internal chip monitors this capacitance in real-time. Upon detecting the change from C1 to C2, it immediately determines "water present" and sends a clear switch signal to the coffee machine's main board.
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Specific Calibration: We precisely calibrate our sensors for the common plastic tank materials and the dielectric constant of water, ensuring sensitive and accurate triggering. •
Anti-Interference Design: Effectively distinguishes real level changes from interference caused by ambient temperature or humidity variations, preventing false triggers.
