The RL-1 EKF float switch with cable is designed to monitor the level of various liquids. It is used as a level sensor (relay) in automatic filling/emptying systems for tanks containing water and other liquids. The device is made of chemically resistant materials, resistant to the following liquids: chlorinated water, household wastewater, detergent and alkaline solutions, organic acids, alcohols, emulsions containing fuel, fats, and oils.