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Title: The Use Of A Density Meter & Microprocessor For Energy Measurement & Control
Author: Joe Agar
Source: 1978 International School of Hydrocarbon Measurement
Year Published: 1978
Abstract: AGA 5 gives the relationship between the specific gravity of the gas (G) and calorific value in BTU/SCF or BTU/LB. AGA 3 shows that considerable improvement in accuracy is possible if an in-line density meter is used instead of P & T correction. AGA 3 and AGA 5 make it possible to use one density meter and d.p. transmitter to measure accurately both FLOW and ENERGY, with very simple solid state instruments. The advantage of the Microprocessor is that it enables the calculation to be performed quickly, reliably, and cheaply. It replaces calorimeters and gravity meters and measures and controls fuel supply to boilers, furnaces, etc. with a very wide variation in gas composition.

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