Reynolds number correction function for mass flow rate sensor

Details Reynolds number correction function for mass flow rate sensor Reynolds number correction function for mass flow rate sensor

2006-02-21

2006-02-21

Patel, Harshad (Department: 2855)

Measuring and testing

Volume or rate of flow

Proportional

C073S204210

Reexamination Certificate

active

07000463

ABSTRACT:
A mass flow rate sensor uses a Reynolds number correction function to compensate for errors in a bypass ratio of the sensor for all gases, based on the fact that all bypass errors are functions of Reynolds number. The sensor includes a sensor tube and a bypass tube dividing flow, wherein a bypass ratio of the sensor equals a total flow rate through the sensor divided by a flow rate through just the sensor tube. Heater elements heat an upstream portion and a downstream portion of the sensor tube, and a circuit is connected to the heater elements for producing a voltage based upon a difference in resistance between the heater elements. The voltage is calibrated based on known flow rates of a reference gas, and the flow rate through the sensor is based upon the calibrated voltage multiplied by a multi-gas correction function and a Reynolds number correction function.

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Califlow A-250, Calibration&Service, MKS Technology for Productivity.
Molbloc/molbox Gas Flow Standards, DHI Calibration Solutions for Pressure and Flow.

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