Abstract: The present invention refers to a device for controlling and regulating the physical-biochemical condition of a liquid mixture (1) in a process in at least one container (3), e.g. a plastic bag (4), which is provided at a mixing means (5) on at least one mixing table (2), where said liquid mixture (1) is mixed by tilting of said mixing table (2). Sensors (8) are provided in said liquid mixture (1), which notice the physical-biochemical condition in the liquid mixture (1), which is registered in the form of measured measurement test results (9) in a computer/processor (7), in which they are compared with desired, predetermined determined measurement test results (10).

Abstract: An electric circuit comprises a plurality of high power switching services connected in series and adapted to be controlled to be all conducting or blocking substantially simultaneously act together as a single switch and each holding a part of a high voltage to be held by the switch in the blocking state of the switching devices. Each switching device has an avalanche diode of SiC connected in anti-parallel therewith and adapted to start to conduct current when reverse biased as of a predetermined voltage limit for preventing that the voltage across the respective switching device exceeds such limit.