100mm Used for pressure measurement of liquids and gases. Simga membrane manometers are used to measure liquids, gases and inhomogeneous high viscosity substances. These manometers can be less affected by vibrations and shocks compared to other bourdon spring manometers. Due to their special structure, membrane manometers are not affected by extreme pressures. Open flanged type is foreseen to be used in the measurement of high viscosity and crystalline substances.