Metrology is the scientific study of measurement.
Legal metrology is the part of metrology where regulations are implemented in order to ensure an appropriate level of credibility in measurement results, whenever conflicting interests exist, or when incorrect measurement results may adversely affect individuals or society itself.
Please check that your site is not purely describing a company manufacturing tools, or directly servicing industry.
If it is, it should be submitted to Business/Industrial_Goods_and_Services/Machinery_and_Tools/Industrial_Metrology.
Please submit your site to the most suitable scientific topic, but if the instrumentation is for manufacturing, production or other industrial use please go straight to Industrial_Metrology.
Books and journals focusing on scientific measurement.