Device and method for extracorporeal blood treatment

DPTFPTA device for extracorporeal blood treatment includes a balancing system and calculates an ultrafiltration volume (UF) as a volume withdrawal on the basis of a pressure difference (Δ) and a temperature difference (Δ) at an inlet and an outlet of at least two balance chambers. To this end, pressure sensors are arranged directly behind an inlet and an outlet of the at least two balance chambers, respectively, and determine a fluid pressure at their respective position, and temperature sensors are arranged at inputs of the at least two balance chambers and determine a temperature in the inlet and the outlet of the balance chamber. The ultrafiltration volume (UD) is calculated using the pressure difference (Δ) established on the basis of fluid pressure values determined by the pressure sensors, and the temperature difference (Δ) established on the basis of temperature values determined by the temperature sensors.