… Instruments and apparatus for measuring or checking the flow, level, … gauges, manometers, heat meters), excluding instruments and apparatus of heading 90.14, 90.15, 90.28 or 90.32. …
Explanatory notes
… rate of flow (in volume or weight per unit of time) and are used for measurement of flow both through open channels … (2) Variable area (variable aperture) flowmeters . These usually consist of a graduated cone‑shaped tube containing a …