Patent ID: 8707792

Claim:
A pressure measurement interface for measuring fluid pressure within a disposable arrangement defining a fluid flow path by use of a reusable pressure sensor, the interface including: (a) a disposable pressure sensing cell deployed in fluid connection with said fluid flow path, said pressure sensing cell including a closed liquid-filled sensing volume isolated from fluid in the fluid flow path by a flexible membrane, said sensing volume having a first portion of a mating configuration; and (b) a second portion of a mating configuration associated with the reusable pressure sensor and configured for mating with said first portion of said mating configuration so as to form fluid interconnection between the pressure sensor and said liquid-filled sensing volume, wherein the pressure sensor is a differential pressure sensor measuring a pressure differential between a first and a second measurement port, the interface further including a second disposable pressure sensing cell deployed in fluid connection with a second region in said fluid flow path and a second mating configuration for connecting between said second disposable pressure sensing cell and the differential pressure sensor.