An ultrasonic transducer arrangement for a clamp-on ultrasonic flow measuring point based on the travel time difference principle, comprising: a plurality of ultrasonic transducers which are adapted to be arranged on an outside of a measuring tube of the clamp-on flow measuring point, wherein the ultrasonic transducers each have at least one transducer element for generating and/or receiving ultrasonic signals and a coupling element, wherein the coupling element has a first contact area (22.1) and a second contact area (22.2), wherein the transducer element is arranged on the first contact area, and wherein the ultrasonic transducer is adapted to come into contact with the measuring tube by means of the second contact area, wherein the ultrasonic transducers are adapted to radiate ultrasonic signals into the measuring tube and/or to receive ultrasonic signals coming from the measuring tube, wherein the second contact areas each have a normal, wherein the normals define a plane, in which plane ultrasonic signal paths of the ultrasonic signals run, wherein first ultrasonic transducers (20.1) define first ultrasonic signal paths running parallel to one another, and wherein second ultrasonic transducers (20.2) define second ultrasonic signal paths running parallel to one another, wherein the ultrasonic signal paths run in the plane, wherein the ultrasonic signal paths of the first ultrasonic transducers and of the second ultrasonic transducers in the coupling element each run obliquely to the second contact area, wherein a direction of the first ultrasonic signal paths and a direction of the second ultrasonic signal paths are mirror-symmetric to one of the normals, wherein first ultrasonic signal paths have crossing points with second ultrasonic signal path in the plane, wherein the crossing points possess parallels, which parallels run perpendicularly to the normals in the plane, wherein a first group of associated ultrasonic transducers exclusively has first ultrasonic transducers with a first number, and wherein a second group of associated ultrasonic transducers has exclusively second ultrasonic transducers with a second number, wherein adjacent ultrasonic transducers of the first group are each first distances from one another in the direction of the parallels, and wherein adjacent ultrasonic transducers of the second group are each second distances from one another in the direction of the parallels, wherein the first distance and the second distance are not the same, wherein 2 ∗ A1 >= A2 >= 1.125 ∗ A1, and in particular 1.75 ∗ A1 >= A2 >= 1.16 ∗ A1, and preferably 1.6 ∗ A1 >= A2 >= 1.25 ∗ A1, wherein a relationship between the first distance and the second distance corresponds to the following equation: (a+1) ∗ A1=a ∗ A2 where b > a > 1, a is a natural number and b is less than 9, and in particular less than 7, and preferably less than 5. a plurality of ultrasonic transducers which are adapted to be arranged on an outside of a measuring tube of the clamp-on flow measuring point, wherein the ultrasonic transducers each have at least one transducer element for generating and/or receiving ultrasonic signals and a coupling element, wherein the coupling element has a first contact area (22.1) and a second contact area (22.2), wherein the transducer element is arranged on the first contact area, and wherein the ultrasonic transducer is adapted to come into contact with the measuring tube by means of the second contact area, wherein the ultrasonic transducers are adapted to radiate ultrasonic signals into the measuring tube and/or to receive ultrasonic signals coming from the measuring tube, wherein the second contact areas each have a normal, wherein the normals define a plane, in which plane ultrasonic signal paths of the ultrasonic signals run, wherein first ultrasonic transducers (20.1) define first ultrasonic signal paths running parallel to one another, and wherein second ultrasonic transducers (20.2) define second ultrasonic signal paths running parallel to one another, wherein the ultrasonic signal paths run in the plane, wherein the ultrasonic signal paths of the first ultrasonic transducers and of the second ultrasonic transducers in the coupling element each run obliquely to the second contact area, wherein a direction of the first ultrasonic signal paths and a direction of the second ultrasonic signal paths are mirror-symmetric to one of the normals, wherein first ultrasonic signal paths have crossing points with second ultrasonic signal path in the plane, wherein the crossing points possess parallels, which parallels run perpendicularly to the normals in the plane, wherein a first group of associated ultrasonic transducers exclusively has first ultrasonic transducers with a first number, and wherein a second group of associated ultrasonic transducers has exclusively second ultrasonic transducers with a second number, wherein adjacent ultrasonic transducers of the first group are each first distances from one another in the direction of the parallels, and wherein adjacent ultrasonic transducers of the second group are each second distances from one another in the direction of the parallels, wherein the first distance and the second distance are not the same, wherein 2 ∗ A1 >= A2 >= 1.125 ∗ A1, and in particular 1.75 ∗ A1 >= A2 >= 1.16 ∗ A1, and preferably 1.6 ∗ A1 >= A2 >= 1.25 ∗ A1, wherein a relationship between the first distance and the second distance corresponds to the following equation: (a+1) ∗ A1=a ∗ A2 where b > a > 1, a is a natural number and b is less than 9, and in particular less than 7, and preferably less than 5.