At present, one of the priorities of the national policy is the issue of energy saving and energy efficiency, formulated in the Energy Strategy.
Given the constant rise in energy prices, the application of effective energy saving measures both among the population and in entire sectors of the country is difficult without reliable information about the resources consumed.

Measuring the consumption of energy-forming substances of various phase states (loose, liquid, gaseous and vaporous) is also relevant for the oil industry.

However, the physical properties of the measured flows (viscosity, density, phase ratio in the flow, etc.) depend on the temperature and pressure

in the operating conditions. With a multiple increase in the number of metering devices, the amount of reliable information about consumption increases, and, at the same time, the cost of their maintenance increases to maintain them in working condition.
The quality of the accuracy of the operated metering system at the enterprises of the oil and gas complex affects the profit from the conduct of commodity and commercial operations.
When receiving (delivering) oil, the following methods for measuring the gross mass are determined:

- direct method of dynamic measurements - based on direct

measurements of the mass of the product using mass meters in pipelines;

- direct method of statistical measurements - based on direct

measurements of the mass of the product by statistical weighing or weighing in

road or rail tanks and trains during their movements on the scales;

- indirect method of dynamic measurements - based on measurements in

pipeline volume and density of the product;

- indirect method of static measurements - based on measurements of

volume of the product in measures of capacity (measures of full capacity) and density;

- indirect method of the hydrostatic principle - based on measurements

in terms of product level capacity and hydrostatic pressure.