Patent ID: 9046435
Filing Date: 2015-06-02
Classification: G01L,Y10T

Abstract:
1. A retrievable pressure sensor for installation in an opening through a pipe or chamber wall for the in situ measurement of pressure in a process fluid in the pipe/chamber, the pressure sensor comprising: a pressure-transferring arrangement comprising: an outer sensor part having a pressure sensing element, a second cavity containing a pressure-transferring fluid in pressure communication with the pressure sensing element, a third separation diaphragm bounding the second cavity, the third separation diaphragm being configured for pressure communication with the second separation diaphragm for the transferal of pressure between the pressure-transferring fluid in the cavity and the pressure-transferring fluid in the second cavity, and a third volume surrounding respective outer peripheries of the second and third separation diaphragms when the second and third separation diaphragms are in pressure communication, a pressure in the third volume being adjustable.