Warranty : 1 Year Manufacture, Warranty Service : Replacement, Package contains : 1 Water level controller unit, 6 Carbon sensors, 1 User manual with all technical details, 1 Pack mounting screw. Working : This model automatically switch ON and switch OFF motor. As shown in diagram above, out of 6 Sensors, 3 sensors put at Top, Middle & Ground level of the Overhead Tank & Other 3 sensors put at Top, Middle & Ground of the Under Ground Tank. When water level of overhead tank becomes low means water get down from middle sensor and water is present in the underground tank or sump, motor get start automatically. The tank starts filling up. When the water level reaches to the higher level, the motor automatically gets switched off. Auto off when the tank is full or sump is empty. Suitable for motor up to 5 HP, Protect motor from dry running. Easy Installation, Advance Embedded Technology, Power on LED Indication Provided. Water Level indications provided (OH OL UL UH). Product Descriptions : high quality enclosure. compact size. Supply voltage : 220-280 V AC, 40 A load capacity, suitable for motor up to 5 HP Sensing element : carbon sensor, it is free from oxidation, long life. Auto and Manual mode switch available. Also suitable for MCB Starter panel see diagram above for connection. Fully automatic, controls from underground tank to overhead tank so no man power required. Long service Life, Applications : Automatic water level controller is of much used in homes, hospital, industries, Bore. Use of this product saves water, saves electricity and save times. Helps in preventing overflow of water from the overhead tank.