Phoenix technology is an industry-first in that it utilizes sonar to map out the water levels in a tank. It is easy to use device which: 1) Makes any motor automatic . 2 ) Start motor when water in an overhead tank is below 40%. 3) Turns the motor off when tank is full. 4) Protects the motor from dry run. Ultrasonic sensors: Advance age technology designed and perfected by Nara Technologies. It is sensor which: 1) Does not come in contact with water. 2) Uses high technology echo location to determine water levels. 3) It is noise proof up to 1Km cable length. 4 )It has accuracy of 2mm. Suitable for single phase motors.