Measuring the physical properties of rocks under simulated in situ conditions in the laboratory is crucial for a comprehensive characterization of natural geological reservoirs. The long-term flow-through apparatus SEPP consists of a total of 6 temperature-controlled oil pressure chambers, whose internal set-up allows combined measurements of permeability, P and S wave velocity, and complex electrical conductivity (leakage current-free 4-pole measurements) on rock cylinders (d = 25/30 mm, …