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Title: Installation And Operation Of Densitometers
Author: Eric Estrada, Don Sextro
Source: 2006 International School of Hydrocarbon Measurement
Year Published: 2006
Abstract: A densitometer is an electromechanical device used to measure the density of a flowing stream. Because it measures density, a densitometer is often called a density meter. This paper uses densitometer and density meter interchangeable. The stream to be measured is usually a single-phase liquid, but instead could be a single-phase gas or vapor. In the oil and gas industry, a densitometer usually measures the density of liquid hydrocarbon finished products or liquid mixtures. Other industries use densitometers to measure the density of fluids like milk, vinegar and syrup. As an electromechanical device, the densitometer uses electrical power and a mechanical arrangement of tubing, tuning fork or a float and chamber to measure the density of the fluid flowing through the device. The densitometer transmits an electrical signal representing the measured density. Density can be measured either continuously or in discrete batches such as would be the case with a spot sample. Many of the density measurements taken in the oil and gas industry are determined by continuous densitometers. These densitometers are commonly installed on a meter skid and have a least a portion of the flowing stream flowing through them. Measuring density is discrete batches generally occurs in a pycnometer proving, a weigh tank or when using a hydrometer. If stream composition changes frequently or unpredictably, a continuous densitometer is appropriate.

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