***This Model is Suitable for all Single Phase AC220-240V Submersible Water pumps up operated by a Starter panel system*** Walnut Water level controller is an electronic product which controls the water pump automatically.Working : Automatic water level controller switch ON the motor when the water level in the overhead tank goes below low level sensor and , SWITCH OFF the motor when water level rises up to high level sensor, motor also switches off when the sump water is at below FOOTVALVE level. Automatic water level controller allows you to decide the water storage levels for operations of the pump in the overhead tank and the sump. Specifications & other features: Input voltage is 220-240V AC Fully automatic functionsUsefull for only overhead tank or only undergorund or both tank system Advantages : You not need to touch your Motor switches every day. Our system will switch ON / OFF your Motor automatically. Switches OFF the motor automatically if the Sump is empty. During emergency use your motor manually at any time. No chances of overflow, current wastage and motor burnout. Direct Plug & Play, Fast &; Easy Installation. Applicable to all types of motors, capacity and liquid (salt / sewage water) No need of manpower to maintain the motor, sump and tank. Avoids seepage of water from roofs & walls due to overflowing tanks. Useful for :HOUSE OWNERS - who wants to save their electricity,water & protect dry run.Very useful Shopping complex, apartments, Bungalows Multi-storied apartments Hospitals Factories Hotels and restaurants PACKAGE INCLUDES: Water Level Controller Level Sensor 6 Units Installation Manual Technical Support avilable after sales