FIELD: techniques of modelling of filtration and displacement of fluids through capillary-porous bodies. SUBSTANCE: device for investigation of filtration processes and determination of characteristics of fluids and porous bodies has two hydraulic cylinders 1 and 2 which have pistons 4 and 5 installed in bodies 6 and 7, respectively. Each hydraulic cylinder 1 or 2 has pressure pickup 8 or 9 and displacement transducer 10 or 11. Pressure chambers of hydraulic cylinders 1 and 2 are communicated with channels passing fluids to ends of body 3 for location of porous medium. Bodies 6 and 7 are secured to common body 12. Drive of piston 4 reciprocates piston 4 by means of couple screw 13-nut 14, and drive of piston 5 reciprocates piston 5 by means of couple of screw 15-nut 16. Screw 13 is connected to piston 4 and to motor 17, and screw 15 is connected to piston 5 and motor 18. Bodies 6 and 7 are spring-loaded by flexible members 19 and 20 located between end of body 6 and nut 14 and between end of body 7 and nut 18
