Instruments and apparatus for physical or chemical analysis (for example, polarimeters, refractometers, spectrometers, gas or smoke analysis apparatus); instruments and apparatus for measuring or checking viscosity, porosity, expansion, surface tension or the like; instruments and apparatus for measuring or checking quantities of heat, sound or light (including exposure meters); microtomes [other than instruments and apparatus for medical, surgical, dental or veterinary uses for physical or chemical analysis] — GST rate 18%

As per Notification 9/2025, instruments and apparatus for physical or chemical analysis (for example, polarimeters, refractometers, spectrometers, gas or smoke analysis apparatus); instruments and apparatus for measuring or checking viscosity, porosity, expansion, surface tension or the like; instruments and apparatus for measuring or checking quantities of heat, sound or light (including exposure meters); microtomes [other than instruments and apparatus for medical, surgical, dental or veterinary uses for physical or chemical analysis] classified under HSN 9027 attracts 18% GST effective 22 September 2025. On an intra-state supply this is charged as 9% CGST plus 9% SGST; on an inter-state supply the full 18% is charged as IGST. This rate applies subject to the condition: other than instruments and apparatus for medical.