The invention discloses a high-precision spiral-flow type
crude oil moisture content
measuring instrument, which comprises a cavity, an inlet
pipe, a
cyclone, an outlet
pipe, a micro
differential pressure sensor I and a micro
differential pressure sensor II, wherein the cavity is divided into a left chamber and a right chamber by a partition plate, contrast liquid is injected into the left chamber, and
crude oil mixed-phase liquid to be measured is injected into the right chamber; the inlet
pipe and the outlet pipe are communicated with the upper end and the lower end of the right chamber respectively, the
cyclone is connected with the right chamber and used for separating a
gas phase in the to-be-measured mixed-phase liquid, the micro
differential pressure sensor I is used for detecting that the liquid level of the right chamber reaches the designated height, and the micro differential
pressure sensor II is used for measuring the
pressure difference of the same liquid level of the twochambers. The high-precision spiral-flow type
crude oil moisture content
measuring instrument disclosed by the invention can be used for effectively separating a
gas phase in crude oil, can be directly connected into a crude oil pipeline for use, is convenient to measure and high in efficiency, realizes high-precision measurement at lower
measurement cost, and prolongs the average continuous fault-free working time of the instrument as a measuring port of the instrument is not in direct contact with the crude oil.