Mini-Colorimetric Photometers

The Hanna Instruments HI753 Chloride Colorimeter – Checker® HC delivers fast, accurate digital chloride testing for water quality applications. Co...

Nitrate is the final step in the nitrogen cycle, and excessive levels in saltwater aquariums can fuel algae and dinoflagellate growth. The Hanna I...

The Hanna Instruments HI713 Low Range Phosphate Colorimeter – Checker® HC is designed to make phosphate testing simple, accurate, and affordable f...

The Hanna Instruments HI717 High Range Phosphate Colorimeter – Checker® HC delivers lab-grade accuracy in a compact, pocket-friendly meter. Phosph...