For connections to the process using connection flanges, the monoflange enables an optimal and compact measuring point assembly. In addition, stress from vibration, potential leak points as well as installation and maintenance costs are reduced. The monoflange is mounted directly onto the axial flange (radial flange on request), allowing the gauge to be kept in an upright position. The monoflange includes a block valve, a bleed valve and a vent hole.