TDC time governed dosing controller is specifically designed to control the amount of fluid from effluent tanks to septic fields. An adjustable duel timer permits the pump to deliver the proper amount of liquid volume to the field. The system is controlled by mechanical floats, which operate when fluid levels in the effluent tanks reach designated levels. A high level alarm will provides immediate warning in case of system malfunctions. TDC controller comes in two different configurations for simplex or duplex application.