HACH HQD Benchtop Multiparameter Meter by Hachfeld HACH HQD Benchtop Multiparameter Meter by Hachfeld Description Description HACH HQD Benchtop Multiparameter Meter by Hachfeld Related products HACH pH, Conductivity, TDS, DO, ISE Intellical Probes by Hachfeld HACH Water Testing Reagents by Hachfeld Calibration Standards HACH HQ Series Portable Meters by Hachfeld