Patent ID: 6973375

Claim:
A flow control device comprising: an inlet; an outlet in fluid communication with the inlet; a pressure loss element between the inlet and outlet in fluid communication with the inlet and outlet; a first pressure sensor located upstream from the pressure loss element configured to measure a first pressure of a fluid flowing through the flow control device; a second pressure sensor located downstream from the pressure loss element, configured to measure a second pressure of the fluid flowing through the flow control device; and a controller coupled to the first pressure sensor and the second pressure sensor, the controller configured to: operate according to a first mode of operation, wherein during the first mode of operation the controller generates a valve control signal based on a differential between the first pressure and the second pressure; operate according to a second mode of operation, wherein during the second mode of operation the controller generates the valve control signal based on a measured pressure at a particular pressure sensor; and switch between the first mode of operation and the second mode of operation according to a predefined parameter.