HACH HQ Series Portable Meters by Desalytics HACH HQ Series Portable Meters by Desalytics Description Description HACH HQ Series Portable Meters by Desalytics Related products Digital Titrators. Portable and robust digital Titrator HACH HQD Benchtop Multiparameter Meter by Desalytics DR900 Multiparameter Portable Colorimeter by Desalytics HACH DR3900 Vis Spectrophotometer by Desalytics