These pressure gauges with diaphragm pressure elements are suited to gaseous and liquid, aggressive media. Pressure gauges with open connecting flanges are even suitable for highly viscous and contaminated media, in aggressive environments too. Depending on the instrument model and pressure range, an overload safety of 3x or 5x the full scale value is standard. This overload safety is also possible for 10, 40, 100 or 400 bar (145, 580.2, 1,450.4 psi) special designs. The measurement accuracy is maintained. With high dynamic pressure loads and vibrations, a liquid filling within the case of the pressure gauge ensures precise readability. Optional special materials are available for wetted parts.