The Union type diaphragm pressure gauge is an instrument specifically designed for handling difficult media. Its core design is to isolate the internal precision measuring components from external high viscosity, easy crystallization, strong corrosion and other media through a diaphragm, avoiding instrument damage. The "flexible knot" (or flexible nut) connection method makes it more flexible and quick to disassemble compared to fixed threaded installation, especially suitable for occasions that require frequent cleaning or replacement.