EPS 3500 XL is a high quality, high precision and safe power supply for electrophoresis applications that require advanced programming and high voltage. Nine programs each with up to nine phases can be saved. Limiting values for voltage, current and power as well as voltage gradients can be programmed for precise control of the electrophoresis. The EPS 3500 XL automatically switches over the controlling parameter according to programmed limits and gradients and conductivity variations in the system. Two electrophoresis units can be connected to the EPS 3500 XL and run with the same programmed method at one time.