DIFFERENTIAL PRESSURE SENSOR WITH PROTECTION AGAINST PRESSURE SURGES AND OVERLOAD Russian patent published in 2025 - IPC G01D3/28 G01L9/00 

FIELD: measuring.

SUBSTANCE: invention relates to measurement equipment, in particular to pressure transducers, and can be used to measure pressure difference. Device includes a housing in which there are receiving, protective, compensation and measuring chambers interconnected by flow channels and hydraulic throttles and filled with low-compressible electric insulating liquid. Each receiving chamber is sealed with a pressure-sensitive separating membrane located with a gap relative to the shaped base. At the outlet of each receiving chamber there is a petal valve in the form of a disk from a spring alloy, which is closed during abrupt (stepwise) supply of pressure, thus preventing pressure increase in the measuring chamber. Hydraulic throttles are installed at the outlet of the petal valve and at the inlet of the measuring chamber, which together with the petal valve prevent failure of the sensitive element (strain gauge) from pressure surges and static pressure overload.

EFFECT: providing resistance to overload pressures, pressure surges and faster operation of the sensor.

1 cl, 3 dwg