There are several general purpose acid-base titrators available commercially. Apollo SciTech's AS-ALK2 is one that truly automates the Gran titration procedure (include controlling the titration and standardization procedures and the calculation of the final result).
AS-ALK2 is designed for both laboratory and shipboard use with small sample volume (10-25 mL) and high precision (0.1% or better). The titrator is fully-automated with standardization and sample analysis. AS-ALK2 provides Gran titration for alkalinity determination of both seawater and brackish waters. Full temperature control is provided on all liquids.