HACH Automatic Titrator by Hachfeld HACH Automatic Titrator by Hachfeld Description Description HACH Automatic Titrator by Hachfeld Related products DR900 Multiparameter Portable Colorimeter by Hachfeld Autotitrators, Hach’s TitraLab AT1000. HACH DR300 Pocket Colorimeter by Hachfeld HACH DR1900 Portable Spectrophotometer by Hachfeld