Hydraulic measuring unit designed to record differential pressures, comprising; - a measuring unit body (10, 110, 210, 310) with a process connection surface (16, 116, 216, 316) oriented in essentially one direction, wherein the measuring unit body (10, 110, 210, 310) has a first pressure entry opening which extends from the process connection surface (16, 116, 216, 316) through the measuring unit body (10, 110, 210, 310) to a rear surface of the measuring unit body (10, 110, 210, 310); wherein the measuring unit body (10, 110, 210, 310) has a second pressure entry opening which extends from the process connection surface (16, 116, 216, 316) through the measuring unit body (10, 110, 210, 310) to the rear surface of the measuring unit body (10, 110, 210, 310); - a first process isolating diaphragm (28, 328), which seals the first pressure entry opening on the side of the process connection surface (16, 116, 216, 316); - a second process isolating diaphragm (30, 330), which seals the second pressure entry opening on the side of the process connection surface (16, 116, 216, 316); - a first pressure tube (20, 120, 220, 320), which is arranged with a section in the first pressure entry opening, wherein the first pressure tube (20, 120, 220, 320) projects out of the rear surface of the measuring unit body (10, 110, 210, 310); and - a second pressure tube (22, 122, 222, 322), which is arranged with a section in the second pressure entry opening, wherein the second pressure tube (22, 122, 222, 322) projects out of the rear surface of the measuring unit body (10, 110, 210, 310); wherein the first and second pressure tube are connected in a pressure-tight manner with the measuring unit body (10, 110, 210, 310), characterized in that the first pressure tube (20, 120, 220, 320) and the second pressure tube (22, 122, 222, 322) are connected with measuring unit body (10, 110, 210, 310) in a pressure-tight manner from the side of the process connection surface (16, 116, 216, 316), wherein the first pressure tube (20, 120, 220, 320) and the second pressure tube (22, 122, 222, 322) are connected with the measuring unit body (10, 110, 210, 310) in a pressure-tight manner by welding with a peripheral welding seam (24, 26) on the side of the process connection surface (16, 116, 216, 316). - a measuring unit body (10, 110, 210, 310) with a process connection surface (16, 116, 216, 316) oriented in essentially one direction, wherein the measuring unit body (10, 110, 210, 310) has a first pressure entry opening which extends from the process connection surface (16, 116, 216, 316) through the measuring unit body (10, 110, 210, 310) to a rear surface of the measuring unit body (10, 110, 210, 310); wherein the measuring unit body (10, 110, 210, 310) has a second pressure entry opening which extends from the process connection surface (16, 116, 216, 316) through the measuring unit body (10, 110, 210, 310) to the rear surface of the measuring unit body (10, 110, 210, 310); - a first process isolating diaphragm (28, 328), which seals the first pressure entry opening on the side of the process connection surface (16, 116, 216, 316); - a second process isolating diaphragm (30, 330), which seals the second pressure entry opening on the side of the process connection surface (16, 116, 216, 316); - a first pressure tube (20, 120, 220, 320), which is arranged with a section in the first pressure entry opening, wherein the first pressure tube (20, 120, 220, 320) projects out of the rear surface of the measuring unit body (10, 110, 210, 310); and - a second pressure tube (22, 122, 222, 322), which is arranged with a section in the second pressure entry opening, wherein the second pressure tube (22, 122, 222, 322) projects out of the rear surface of the measuring unit body (10, 110, 210, 310);