Abstract: Systems and methods for measuring a flow rate through a nozzle include generating a first polynomial relationship between pressure and output voltage for a first pressure transducer located at one end of the nozzle and generating a second polynomial relationship between pressure and output voltage for a second pressure transducer located at another end of the nozzle. When a first voltage signal is received from the first pressure transducer and a second voltage signal from the second pressure transducer, the associated first and second pressures are generated based on the first and second polynomial relationships. A flow rate through the nozzle is then constructed based on the difference between the first pressure and the second pressure.

Abstract: Systems and methods for measuring a flow rate through a nozzle include generating a first polynomial relationship between pressure and output voltage for a first pressure transducer located at one end of the nozzle and generating a second polynomial relationship between pressure and output voltage for a second pressure transducer located at another end of the nozzle. When a first voltage signal is received from the first pressure transducer and a second voltage signal from the second pressure transducer, the associated first and second pressures are generated based on the first and second polynomial relationships. A flow rate through the nozzle is then constructed based on the difference between the first pressure and the second pressure.

Abstract: Apparatus for measuring a differential pressure of a fluid flowing through a fluid line includes a nozzle having a nozzle interior wall defining a nozzle chamber. The nozzle interior wall tapers at a constant rate of area reduction to generate a laminar fluid flow. A differential pipe is coupled to the nozzle and fluidly communicates with a downstream portion of the fluid line. The differential pipe has a pipe interior wall defining a differential chamber fluidly communicating with the nozzle chamber. A first pressure port is formed in the nozzle and fluidly communicates with the nozzle chamber to obtain a first gauge pressure of the fluid, and a second pressure port is formed in the differential pipe and fluidly communicates with the differential chamber to obtain a second gauge pressure of the fluid.