This standard applies to magnetic ferritometers in accordance with GOST 26364-84 and establishes the methodology for their primary and periodic testing
GOST 8.518-1984 history
2010GOST 8.518-2010 State system for ensuring the uniformity of measurements. Ferritometers for austenitic steels. Verification procedure
1984GOST 8.518-1984 State system for ensuring the uniformity of measurements. Ferritometers for austenite steel. Methods of verification