Cyw-152b and CYW153B stainless steel differential pressure gauge (hereinafter referred to as the meter) are applicable to measure the differential pressure and flow of various liquid (gas) medium in the process of chemical industry, chemical fiber, metallurgy, electric power and nuclear power. The instrument structure is made of stainless steel, among which the measuring system (double corrugated pipe and connecting parts), the pressure guide system (including joint and pipe, etc.) adopt special structure design reasonable, advanced technology, small volume, light weight, good stability, long service life, novel appearance, strong adaptability and other advantages. The connection forms of the instrument joint are parallel (can be directly connected with three valve sets) and inclined type, which can adapt to different customers' matching installation.