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bottle-top-dispenser
Hawach produces

mechanical bottle-top dispensers and electronic bottle-top dispensers

, they can handle most of the strong acid and alkali solutions such as H3PO4, HCl, H2SO4, NaOH, NaCl, etc. The bottle-top dispenser is fixed on the reagent bottle through the screw valve, and the closure is tight and stable, so that the solvent removal process is in a closed system, avoiding the volatilization, splashing, tipping, etc. of the solution, reducing the environment and human beings. Much safer than a fully open pipetting process like a graduated cylinder.