the product is specially designed for irrigation/sewage/drainage application with overflow alarm by liquid sensors or float switch and protection of single phase stainless steel/cast iron submersible pump for deep well , centrifugal pump with output of pump motor: 0.37-4KW(0.5HP-5.5HP), direct startup type. Its special layout makes it possible to realize the sensitive and reliable function of stopping protection against pump dry-running without installing lower water tank (well) sensor, which makes it more convenient and economical to install deep-well submersible pump and pipeline pump