| 主权项 |
1. A retrievable pressure sensor for in situ measurement of pressure in a process fluid in a pipe/chamber, the pressure sensor comprising:
a pressure-transferring device comprising:
a first device for sealing attachment in an opening in a wall of the pipe/chamber where the pressure is to be measured, the first device comprising:
a first separation diaphragm for separating between the process fluid and a pressure-transferring fluid,a second device for attachment at a distance from the pipe/chamber where the pressure is to be measured, the second device comprising:
a second separation diaphragm; anda first cavity containing the pressure-transferring fluid, wherein the first cavity comprising a capillary tube for a pressure transferring connection between the first device and the second device, and where the pressure sensor further comprising: an outer sensor part having a pressure sensing element, where the outer sensor part is attached at a distance from the pipe/chamber where the pressure is to be measured, the outer sensor part comprising: 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 pressure transferal between the pressure-transferring fluid in the cavity and the pressure-transferring fluid in the second cavity; and a volume surrounding respective outer peripheries of the second and the third separation diaphragms when the second and the third separation diaphragms are in pressure communication, a pressure in the volume surrounding respective outer peripheries of the second and the third separation diaphragms being adjustable. |
