The amount of reagent used is calculated by subtracting the original volume in the buret from t he volume left after the endpoint has been reached. Alkalinity is calculated based on the amount used. Titrators forcefully expel the reagent by using a manual or mechanical plunger. The amount of reagent used is calculated by subtracting the original volume in the titrator from the volume left after the endpoint has been reached. Alkalinity is then calculated based on the amount used or is read directly from the titrator.
Digital titrators have counters that display numbers.
A plunger is forced into a cartridge containing the reagent by turning a knob on the titrator. As the knob turns, the counter changes in proportion to the amount of reagent used. Alkalinity is then calculated based on the amount used. Digital titrators and burets allow for much more precision and uniformity in the amount of titrant that is used. Remember to wear latex gloves.