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 HACH DR3900 Vis Spectrophotometer by Hachfeld DR3900 VIS DR1900 VIS (PORTABLE) TU5200 Laboratory Laser Turbidimeter by Hachfeld