HSN CodeHSN Description

9023Instruments, apparatus and models, designed for demonstrational purposes (for example, in education or exhibitions), unsuitable for other uses

9025Hydrometers and similar floating instruments, thermometers, pyrometers, barometers, hygrometers and psychrometers, recording or not, and any combination of these instruments - thermometers and pyrometers, not combined with other instruments

8479Machines and mechanical appliances having individual functions, not specified or included elsewhere in this chapter

90021900Lenses, prisms, mirrors and other optical elements, of any material, mounted, being parts of or fittings for instruments or apparatus, other than such elements of glass not optically worked - objective lenses: other

9012Microscopes other than optical microscopes; diffraction apparatus