An integrated motor cartridge for connection to and for use in a pipetting system, comprising: a housing , a guide tube , a piston provided with a plurality of permanent magnets , the piston having a pressure tube facing side and a pressure tube distal side, wherein the piston is arranged in the guide tube and wherein the piston has at least one seal with respect to the guide tube, and a coil assembly by means of which the piston can be moved in the guide tube when current is supplied to the coil assembly, wherein the guide tube, the piston and the coil assembly are arranged in the housing, wherein the integrated motor cartridge further comprises a plurality of magnetic field sensors arranged within the housing along the guide tube for determining the position of the piston , wherein the integrated motor cartridge further comprises a memory element , the memory element containing calibration data, the calibration data describing a correlation between measured values of the magnetic field sensors and the position of the piston , and wherein the integrated motor cartridge further comprises: a pressure tube connection by means of which the guide tube, on the pressure tube facing side o fthe piston, can be connected in a gastight manner to a pressure tube of the pipetting system, and a power connection which is coupled to the coil assembly and adapted to be coupled to a power supply arranged outside of the integrated motor cartridge, wherein the integrated motor cartridge can be introduced into and removed from the pipetting system as a unit. a housing , a guide tube , a piston provided with a plurality of permanent magnets , the piston having a pressure tube facing side and a pressure tube distal side, wherein the piston is arranged in the guide tube and wherein the piston has at least one seal with respect to the guide tube, and a coil assembly by means of which the piston can be moved in the guide tube when current is supplied to the coil assembly, wherein the guide tube, the piston and the coil assembly are arranged in the housing, wherein the integrated motor cartridge further comprises a plurality of magnetic field sensors arranged within the housing along the guide tube for determining the position of the piston , wherein the integrated motor cartridge further comprises a memory element , the memory element containing calibration data, the calibration data describing a correlation between measured values of the magnetic field sensors and the position of the piston , and wherein the integrated motor cartridge further comprises: a pressure tube connection by means of which the guide tube, on the pressure tube facing side o fthe piston, can be connected in a gastight manner to a pressure tube of the pipetting system, and a power connection which is coupled to the coil assembly and adapted to be coupled to a power supply arranged outside of the integrated motor cartridge, wherein the integrated motor cartridge can be introduced into and removed from the pipetting system as a unit. a pressure tube connection by means of which the guide tube, on the pressure tube facing side o fthe piston, can be connected in a gastight manner to a pressure tube of the pipetting system, and a power connection which is coupled to the coil assembly and adapted to be coupled to a power supply arranged outside of the integrated motor cartridge, wherein the integrated motor cartridge can be introduced into and removed from the pipetting system as a unit. <EOS>