These are Generic Float Switch Water Level Controllers often used to automate tank pumps.Functionality: They automate pump operation by detecting liquid levels, which helps prevent water waste from overflows.Applications: These switches are compatible with submersible pumps, sewage pumps, and various containers holding water, oil, or chemicals.Specifications: Commonly available in 220V models with a maximum current of 4 amps, featuring a 2 to 3-meter cable for installation.Structure: The devices are constructed with rugged polypropylene for a non-corrosive casing and typically include a weight for balancing in the tank.