Måling av fluidkonsentrasjoner

摘要

An apparatus and method for determining the proportion of at least one of the components of a fluid mixture of liquid natural gas (LNG), e.g. methane or ethane/methane ratio is characterised by measuring the thermal conductivity of the LNG at two temperatures, then using a control means to indicate the concentration of the components in the LNG. An engine management system for a LNG fuelled engine including the apparatus is also claimed.