… Instruments and apparatus for physical or chemical analysis (for example, … and apparatus for measuring or checking viscosity, porosity, expansion, surface tension or the like; …
Explanatory notes
… 90.27 ‑ Instruments and apparatus for physical or chemical analysis (for example, polarimeters, … chemical substances, or burnt. These include : (i) Orsat’s apparatus consisting mainly of an aspirating bottle, … Wet‑chemical analysers for the determination of inorganic or organic components of liquids, e.g., traces of metals, …