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The sensor is made of quality FR-04double-sided material, with a super large area of 5.0*4.0CM, and the surface is treated with nickel plating, which has superior performance in anti-oxidation, electrical conductivity and service life The module is directly equipped with high-power relay to directly control the load Equipped with potentiometer to adjustment sensitivity, and control the opening of the relay in different water The products are made of high-quality materials, which can effectively avoid corrosion and wear and are durable for use Professional chip sets provide excellent performance in the system