A process monitoring device, preferably for pharmaceutical bioprocess applications, comprising: - a measuring tube module, wherein the measuring tube module comprises at least one measuring tube through which a medium can flow, wherein the measuring tube module has a first vibration exciter component of at least one vibration exciter which is set up to excite the measuring tube module, in particular the at least one measuring tube, to vibrate, wherein the measuring tube module has a first vibration sensor component of at least one vibration sensor, which is set up to detect the vibrations of the at least one measuring tube, - a recording module, wherein the receiving module has a receptacle, wherein the measuring tube module can be inserted into the receptacle, wherein the measuring tube module can be mechanically disconnected from the receiving module, wherein the receiving module comprises a second vibration exciter component of the at least one vibration exciter, wherein the receiving module comprises a second vibration sensor component of the at least one vibration sensor; and - a plant for biotechnical applications, wherein the system has a housing, wherein the housing has a housing wall which delimits an interior of the housing, wherein the housing wall has a cover, wherein the cover has an opening, wherein the receptacle module, in particular the receptacle, extends through the opening into the interior of the housing. - a measuring tube module, wherein the measuring tube module comprises at least one measuring tube through which a medium can flow, wherein the measuring tube module has a first vibration exciter component of at least one vibration exciter which is set up to excite the measuring tube module, in particular the at least one measuring tube, to vibrate, wherein the measuring tube module has a first vibration sensor component of at least one vibration sensor, which is set up to detect the vibrations of the at least one measuring tube, wherein the measuring tube module comprises at least one measuring tube through which a medium can flow, wherein the measuring tube module has a first vibration exciter component of at least one vibration exciter which is set up to excite the measuring tube module, in particular the at least one measuring tube, to vibrate, wherein the measuring tube module has a first vibration sensor component of at least one vibration sensor, which is set up to detect the vibrations of the at least one measuring tube, - a recording module, wherein the receiving module has a receptacle, wherein the measuring tube module can be inserted into the receptacle, wherein the measuring tube module can be mechanically disconnected from the receiving module, wherein the receiving module comprises a second vibration exciter component of the at least one vibration exciter, wherein the receiving module comprises a second vibration sensor component of the at least one vibration sensor; and wherein the receiving module has a receptacle, wherein the measuring tube module can be inserted into the receptacle, wherein the measuring tube module can be mechanically disconnected from the receiving module, wherein the receiving module comprises a second vibration exciter component of the at least one vibration exciter, wherein the receiving module comprises a second vibration sensor component of the at least one vibration sensor; and - a plant for biotechnical applications, wherein the system has a housing, wherein the housing has a housing wall which delimits an interior of the housing, wherein the housing wall has a cover, wherein the cover has an opening, wherein the receptacle module, in particular the receptacle, extends through the opening into the interior of the housing. wherein the system has a housing, wherein the housing has a housing wall which delimits an interior of the housing, wherein the housing wall has a cover, wherein the cover has an opening, wherein the receptacle module, in particular the receptacle, extends through the opening into the interior of the housing.