Tanks weighing system is a highly sensitive automation system used for precise control of materials’ input and output. The tanks are controlled by weight measurement, and materials’ input and output rate can be controlled more accurately by planning and presenting specific formulas. The system also has the capability to formulate based on the weight, time of switching on and off each relay, and to prioritize switching on and off the relays. The automation system can be set up in automatic state with regard to the possibility of the formulas layout. The tanks automation system utilizes ASA 1800 series indicators, which has the capability to exert the formula for multiple tanks as well as for control hopper. As a benchmark, this type of indicator controls the weight of the incoming load and the one of the outgoing load of the system calibration on a daily basis and issues the calibration error warning in the event of any reconciliation. In addition, ASA indicator has a compensatory of additional load error that is programmable as a percent of the total weight.