HACH HQ Series Portable Meters by Hachfeld HACH HQ Series Portable Meters by Hachfeld Description Description HACH HQ Series Portable Meters by Hachfeld Related products ISE Intellical Probes Digital Titrators. Portable and robust digital Titrator DR6000 UV VIS HACH TL23 series laboratory Benchtop Turbidimeter by Hachfeld