Pressure measurement of metal hoses

Metal hose with carbon steel or stainless steel selection, using advanced seizure equipment and technology. Metal hose expansion in daily life, but also commonly used. The upper end of the metal hose opening and the atmosphere, the lower end is connected to the side wall of the container with the measured liquid, the liquid inside the tube will rise along the tube to a certain height h. Accordingly, the relative pressure of the liquid at the wall hole at the lower end of the tube can be calculated P = γh, γ for the capacitance of the liquid.
Metal hose work is in the role of internal pressure along the length of the tube elongation, so that the active end of the displacement of the pressure into a certain relationship. The active end can directly indicate the size of the pressure by driving the pointer. Metal hose is often combined with displacement sensors to form the output for the power of the pressure sensor, sometimes also used as isolation components. As the extension of the metal hose requires a large volume change, so its response speed is lower than the Boden tube. Metal hose is suitable for measuring low pressure.
In the metal hose wave crest and bottom valley and tube side valley are tangential tension, axial pressure or tangential pressure, axial tension complementary law of change; each point measured under constant load tangential strain is larger, the axial strain is relatively small. Metal hose wave peak and trough in the metal hose, tube bottom, tube side are stress concentrations, the location of the large equivalent force of each tube diameter and load is closely related; large equivalent force overall with the increase in diameter and increase; with the metal hose wall thickness increases, the large equivalent force is logarithmically decreasing.