Capacitance type sensor for measuring wet steam humidity

The utility model relates to a capacitance type sensor for measuring the humidity of wet steam. After connected with a special-purpose measuring circuit, the utility model can be used for on-line measurement of the humidity of wet steam under flow condition in boilers, steam turbines or other steam generators. Flange plates at both ends of the utility model are used for connecting with a main pipeline at the wet steam point to be measured; inner cylinder bodies are sheathed in a coaxial line; two narrow strip positioning insulating baffle plates are used for ensuring each layer of inner cylinder body wall to have equal space; a grounding polar conducting wire connects an outer cylinder body and the interphase inner cylinder body to be used as a polar plate of a capacitor; a measuring polar conducting wire connects the other inner cylinder bodies to be used as the other polar plate of the capacitor. Compared with the existing steam humidity measurement device, the utility model matched with a special-purpose measuring system has the advantages of low requirement to operating environment conditions, stable and reliable measuring process, high precision of measuring results, simple structure, easy fabrication, convenient operation, low cost for measuring, high safety, good environmental-protection performance, etc.