OIML Recommendation R 15:1974
Instruments for measuring the hectolitre mass of cereals
Scope: This Recommendation defines: 1) The property of cereals known as the "Hectolitre Mass"; 2) the measuring instrument used for determining this property and adopted as the standard instrument by the Member-States of the International Organization of Legal Metrology; 3) The industrial and commercial instruments of the type accepted by the International Organization of Legal Metrology and meant for day-to-day measurement of this mass.