The float switch is a switch which regulates fluid level in the tank or well etc.The float switch is resistant to water(sewaga water),it is relative capable of being used for oil,mostacids and alkalis.The float switch is not explosion proof. Note 1.Details page pictures is only for reference, part of a difference does not affect the user experience, please know it. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.Please forgive it. Rated voltage: 220V Rated current: 4A Wire Length: 4m Protection class: IP65 Mechanical endurance: 100,000times Electrical endurance:500,000times Power range:<500W,500W should add a contactor Working pressure:0.1MPa Control range:0.3M Package size:22 x8 x 11 cm(LxWxH) Environment: pool, oil, weak acid and weak base in water or oil tank,etc.