HI 721 Checker®HC Handheld Colorimeter – Iron Easier to use and more accurate than chemical test kits     Phenanthroline method ±0.04 ppm ±2% of reading accuracy 0.01 ppm (mg/L) resolution (500 points) Large, easy to read digits Auto shut off Dedicated to a single parameter     Designed to work with HANNA’s powder reagents Uses 10 mL glass cuvettes Small size, big convenience     Weighing a mere 64 g (2.25 oz.), the Checker®HC ... Read More »