What are the advantages of the structural design of electric contact pressure gauge?

The electric contact pressure gauge is a high-precision pressure measuring instrument. Its core structural design focuses on the efficient cooperation between elastic elements and electrical contacts. Its pressure sensitive element, the spring tube, is made of high-elastic alloy materials, such as beryllium bronze or 316L stainless steel, and is formed by precision cold rolling process to ensure that it can still maintain excellent elastic properties under high pressure and high temperature environment. The cross-sectional shape is optimized through finite element analysis, which not only improves the deformation sensitivity, but also effectively reduces the risk of stress concentration. The free end of the spring tube and the transmission mechanism adopt a conical surface matching design. The micron-level processing accuracy ensures zero-gap transmission, so that when the medium pressure is converted into the angular displacement of the pointer, the mechanical loss is minimized.

The design of the electrical contact part fully reflects the organic combination of structure and function. The moving contact and the fixed contact adopt a double gold sheet composite structure. The contact material is beryllium bronze. After gold plating, it not only ensures excellent conductivity, but also enhances wear resistance by increasing the hardness of the coating. The regulation of contact pressure depends on the permanent magnet auxiliary mechanism. An elastic buffer pad is provided between the permanent magnet and the moving contact, which not only provides sufficient contact pressure, but also effectively avoids damage to the contact caused by rigid impact. The contact mode supports single-point, double-point and multi-point switching, and users can flexibly configure it according to specific process requirements. For example, in the pressure control of steam boilers, a dual protection mechanism of overpressure alarm and safety valve linkage is realized through double-point contacts.

Environmental adaptability is an important consideration in the structural design of electric contact pressure gauges. The case adopts an integrated casting process, and corrosion-resistant alloy materials (such as Hastelloy C-276) are selected. The surface is sandblasted and hardened, and the protection level reaches IP67, which can effectively resist the erosion of dust, water vapor and chemical media. The sealing structure adopts a composite solution of double O-rings and filled with silicone grease to ensure good airtightness in a wide temperature range of -40℃ to 200℃. For special media (such as liquid ammonia and hydrofluoric acid), a diaphragm structure can be customized to isolate the medium from the measuring element through a fluororubber or polytetrafluoroethylene diaphragm, and use compensation fluid to transmit pressure to ensure that the measurement accuracy is not affected by the corrosion of the medium.

The modular design concept runs through the structural optimization process of the electric contact pressure gauge. The dial and the electrical compartment adopt a split structure, which is connected by a quick-release buckle to facilitate on-site maintenance and calibration. The internal layout of the electrical compartment follows the electromagnetic compatibility (EMC) standard, physically isolates the strong electric control circuit from the weak electric signal circuit, and effectively suppresses electromagnetic interference through the metal shielding cover and the grounding copper busbar. The interface part supports a variety of standard protocols (such as NAMUR and HART), and users can achieve seamless docking with the distributed control system (DCS) and programmable logic controller (PLC) system by replacing the adapter module. For example, in the food processing industry, the electric contact pressure gauge can be integrated with the CIP cleaning system through a sanitary clamp interface to ensure that the equipment meets the requirements of FDA 21 CFR Part 11 regulations.