DIFFERENTIAL PRESSURE SENSOR Russian patent published in 2018 - IPC G01L9/10 

FIELD: instrument engineering.

SUBSTANCE: invention relates to instrument engineering, namely to differential pressure sensors, the primary converter (PP) of which includes sensing elements (CHE) and an inductive converter (PI). Differential pressure sensor can be used in special conditions with shock and long vibration loads, and also has the ability to control a wide range of media, including aggressive and crystallizing media. Differential pressure sensor has two ME, measuring and compensating, which are coaxially located in the negative and positive cavities of the sensor. Each CHE is a membrane box that consist of two welded membranes. IP consists of an inductive transformer and a plunger rigidly coupled to the axis with a measuring CE. Plunger moves inside the separation tube, welded to the sensor housing coaxially with the CHE. Additionally inserted channel combines the internal cavities of the CHE and the internal cavity of the separation tube into a leakproof working cavity, which is filled with a transmission fluid. Under the influence of the pressures of controlled media, deformation of the FE and the movement of associated with them plunger occur. Introduction of a special additional channel alters the correlation of the forces acting on the SC under impact conditions. In this case, the movement of the plunger from the impact of the impulsive load can be completely compensated. Sensor plunger is located in the transmission fluid and is isolated from the influence of controlled media causing additional interference.

EFFECT: providing the ability to control a wider range of environments, including aggressive and crystallizing.

1 cl, 2 dwg