HI 736 Checker HC Handheld Colorimeter – Phosphorus Ultra Low Range Easier to use and more accurate than chemical test kits     Ascorbic acid method ±5 ppb ±5% of reading accuracy Large, easy to read digits Auto shut off Dedicated to a single parameter     Designed to work with HANNA’s reagents Uses 10 mL glass cuvettes Small size, big convenience     Weighing a mere 64 g (2.25 oz.), the Checker®HC easily fits ... Read More »