Turbine meters have been used for the custody transfer of refined petroleum products and light crude oils for over 47 years. When correctly applied, they offer high accuracy and long service life over a wide range of products and operating conditions. Traditionally, turbine meters were used for the measurement of low viscosity liquids and positive displacement meters for higher viscosity fluids. However, new developments in turbine meter technology are pushing these application limits while increasing reliability and accuracy. This paper will examine the fundamental differences between conventional and helical turbine meter measurement. It will also discuss flow conditioning, helical meter proving and viscosity compensation to extend turbine meter application limits
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