The use of passive and active control allows errors to be minimized across a wider dynamic range of conditions. For the Quanta System (previously known as the SC+), the average flow balance error was 1 mL/hr with an SD of 19 mL/hr, and with ultrafiltration it was 13 mL/hr and an SD of 20 mL/hr across all conditions. This paper demonstrates that the hemodialysis system, a small, simple, and versatile CE marked device, operates within the limits required by international standards across a wide range of experimental conditions.