Measuring system with a flow conditioner for flow profile stabilization

A measuring system inserted into the course of a process line for registering at least one measured variable of a medium flowing in the process line, said measuring system comprising:

• a circular-cylindrical measuring transducer, including a measuring tube which serves for conveying the medium to be measured and which shows a smaller flow cross section than a supply segment of the process line connected to an inlet of the measuring system;
• a sensor arrangement which includes at least one sensor element reacting primarily to said variable to be registered and/or reacting primarily to changes of said variable to be registered, and provides, by means of the at least one sensor element, at least one measurement signal influenced by the measured variable;
• and
• a measuring electronics communicating with the measuring transducer and producing, taking into consideration the at least one measurement signal, at least one measured value instantaneously representing the measured variable;
• and
• a flow conditioner arranged at an inlet of said measuring tube, said flow conditioner mediating between said measuring tube and the supply segment of the process line, said flow conditioner showing a lumen which tapers toward said measuring tube, and through which medium flows during operation, an inlet end of said flow conditioner, facing the supply segment of the process line, shows a flow cross section which is greater than the flow cross section of said measuring tube, and an outlet end of said flow conditioner, facing toward said measuring tube, shows a flow cross section which is smaller than the flow cross section of the inlet end of said flow conditioner, wherein:
• said flow conditioner includes, arranged upstream of its outlet end, at least a first inner edge protruding into the lumen of said flow conditioner and against which medium conveyed in said flow conditioner flows during operation;
• said flow conditioner also includes, arranged downstream from the first inner edge, at least a second inner edge likewise protruding into the lumen of said flow conditioner and against which medium conveyed in said flow conditioner flows during operation, and said flow conditioner also includes a first guide surface serving to guide medium flowing in said flow conditioner and a second guide surface serving to guide medium flowing in said flow conditioner, said first guide surface extending between the first inner edge and the second inner edge, and said second guide surface extending from the second inner edge in the direction of the outlet end of said flow conditioner, and
• said flow conditioner shows an installed length, which is smaller than an installed length of said measuring tube, so that an installed length ratio, defined by a ratio of the installed length of said flow conditioner to the install length of said measuring tube, is kept smaller than one.