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 Water Testing Reagents by Hachfeld HACH pH, Conductivity, TDS, DO, ISE Intellical Probes by Hachfeld Packet Pro Testers Chemistries and Reagents