A multiphase flow meter is a device used to measure the individual phase flow rates of constituent phases in a given flow (for example in oil and gas industry) petroleum, water and gas mixtures produced during oil production processes.
http://en.wikipedia.org/wiki/Multiphase_flow_meter
Petroleum Software Limited (PSL), specialise in the provision of multiphase metering systems and solutions for the oil and the process industries.
PSL’s expertise is founded on a proprietary patented technology involving the stochastic analysis of fluid turbulence. The flagship product of the company is known as (Expert System for Multiphase Flow Metering).
ESMER MPFM can be implemented as a turnkey product with a choice of sensors to suit the specific process requirements.