A sample splitter for splitting a sample, in particular a temporally inhomogeneous sample, into two or more aliquots, having: a conduit system (3, 203, 303) with a first conduit (3a, 203a, 303a), a second conduit (3b, 203b, 303b), at least one third conduit (3c, 203c, 203d, 303c) and at least one outlet (6, 206, 306; 7, 307) for taking the two or more aliquots; a sample chamber (4, 204, 304) for the inhomogeneous sample, which is connected to the conduit system (3, 203, 303) and comprises an inlet for the inhomogeneous sample; a first pump (1, 201, 301) with a first flow rate and at least one second pump (2, 202, 302) with a second flow rate, wherein the at least one second pump (2, 202, 302; 215) is a bidirectional pump, and wherein the first and the at least one second pump (1, 201, 301; 2, 202, 302; 215) convey the sample in the conduit system (3, 203, 303); characterized in that the sample chamber (4, 204, 304) is disposed between the first pump (1, 201, 301) and the at least one outlet (6, 206, 306; 7, 307) of the conduit system (3, 203, 303); in that the first conduit is comprised between the first pump and the sample chamber, the second conduit is disposed between the sample chamber and the at least one outlet and the at least one third outlet is disposed between the at least one second pump and the at least one outlet, wherein the conduits (3a, 3b, 3c, 203a, 203b, 203c, 203d, 303a, 303b, 303c) have identical cross-sections or wherein at least the second and third conduit (3b, 3c, 203b, 203c, 303b, 303c) have different cross-sections; and in that the first pump (1, 201, 301) and the at least one second pump (2, 202, 302; 215) operate synchronously, so that as it passes through the conduit system (3, 203, 303), the inhomogeneous sample is simultaneously split into at least two representative aliquots. a conduit system (3, 203, 303) with a first conduit (3a, 203a, 303a), a second conduit (3b, 203b, 303b), at least one third conduit (3c, 203c, 203d, 303c) and at least one outlet (6, 206, 306; 7, 307) for taking the two or more aliquots; a sample chamber (4, 204, 304) for the inhomogeneous sample, which is connected to the conduit system (3, 203, 303) and comprises an inlet for the inhomogeneous sample; a first pump (1, 201, 301) with a first flow rate and at least one second pump (2, 202, 302) with a second flow rate, wherein the at least one second pump (2, 202, 302; 215) is a bidirectional pump, and wherein the first and the at least one second pump (1, 201, 301; 2, 202, 302; 215) convey the sample in the conduit system (3, 203, 303); characterized in that the sample chamber (4, 204, 304) is disposed between the first pump (1, 201, 301) and the at least one outlet (6, 206, 306; 7, 307) of the conduit system (3, 203, 303); in that the first conduit is comprised between the first pump and the sample chamber, the second conduit is disposed between the sample chamber and the at least one outlet and the at least one third outlet is disposed between the at least one second pump and the at least one outlet, wherein the conduits (3a, 3b, 3c, 203a, 203b, 203c, 203d, 303a, 303b, 303c) have identical cross-sections or wherein at least the second and third conduit (3b, 3c, 203b, 203c, 303b, 303c) have different cross-sections; and in that the first pump (1, 201, 301) and the at least one second pump (2, 202, 302; 215) operate synchronously, so that as it passes through the conduit system (3, 203, 303), the inhomogeneous sample is simultaneously split into at least two representative aliquots.