… Hydrometers and similar floating instruments, thermometers, pyrometers, barometers, hygrometers and …
Explanatory notes
… 90.25 ‑ Hydrometers and similar floating instruments, thermometers, pyrometers, barometers, hygrometers and … (e.g., those used to determine the strength of the acid in accumulators) are enclosed in a glass syringe. Other … salinometers; lactodensimeters or lactometers; acidimeters (for determining the specific gravity of …