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Title: Laser 2 Focus Flow Optical Flow Meters For The Measurement Of Natural Gas
Author: Derek Montgomery, Casey Hodges
Source: 2006 International Symposium on Fluid Flow Measurement
Year Published: 2006
Abstract: Photon Control Inc. has developed a new class of optical flow meters based on the laser two focus method, for measuring natural gas in pipelines. Two laser beams, focused into the gas stream, detect the passage of microscopic particulate entrained in the flow. The optical signals are coupled by optical fibers to an electronic processing unit, which computes the velocity of the particulate using correlation analysis. The flow rate is calculated using calibration tables obtained from empirical testing against traceable reference standards.

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