Instruments & Apparatus for Measuring or Checking Liquid Flow or Level

An ultrasonic clamp-on flow meter that operates electrically and measures liquid flow would generally fall under 9026102040 as an electric flow meter for measuring or checking the flow of liquids. The 'clamp-on' installation method does not change the classification; what matters is that the instrument's principal function is liquid flow measurement and that it operates electrically. Importers should confirm the instrument's measurement medium (liquid vs. gas) since gas flow meters fall under a different heading (9026.20).

CBP distinguishes Coriolis flow meters — which measure mass flow rate as a process variable — from weighing instruments, which measure static or batch weight. The key documentation is the manufacturer's specification sheet confirming the instrument measures continuous mass flow rate (expressed in units such as kg/hr or lb/min) for process control, rather than batch or static weighing. Marketing materials, calibration certificates referencing flow-measurement standards, and any applicable CBP binding rulings for the specific model strengthen the 9026.10 classification.