The hydrocarbon dew point (HCDP) is used as a measure of the quality of a natural gas stream and as a criterion for assessing compliance with transportation tariffs. Accurate gas quality data, including HCDPs, are crucial to the effective introduction of liquefied natural gas (LNG) and marginal gas supplies into the natural gas transmission network, and just as crucial to efficient use of the gas by customers. This paper discusses research to evaluate existing automated instruments to objectively measure HCDPs for a range of natural gas mixtures. Emphasis has been placed on accuracy, repeatability, and response time of the dew point instruments.
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