The HI782 Marine Nitrate High Range Colorimeter is specifically designed to quickly and accurately determine high levels of nitrate for saltwater aquariums and marine applications. With a digital read out, there is no more struggling to determine colors visually. 

• Measurements with a range up to 75.0ppm
• Less complex laboratory grade accuracy - Requires only 1 reagent
• Simple, intuitive operation
• Compact and precise whether at home, at work, or on-the-go

Nitrate is the final step in the Nitrogen cycle. Excessive amounts of nitrates in saltwater aquariums facilitate the growth of undesirable organisms such as algae and dinoflagellates.  The HI782 Nitrate Checker HC is a simple, accurate, and cost-effective way to measure nitrate from 0.0 up to 75.0 ppm (as NO₃^–) in your saltwater aquarium.

Using the Zinc Reduction method, a no filter process, The HI782 Nitrate Checker HC measures the concentration of nitrate colormetrically.  Hanna Instruments Checker HC provides quick results in four easy steps:

Features at-a-glance:

• For use with saltwater samples.
• More accurate than chemical test kits.
• Dedicated to a single parameter.
• Small size, big convenience.
• No errors with a digital readout.
• Ideal for aquariums and marine biology applications.

HI782 High Range Nitrate Checker vs HI781 Low Range Nitrate Checker

The HI782 was designed to quickly and easily measure nitrate levels for aquarist with higher-than-average nutrient levels. This includes saltwater aquariums that are fish-only or have corals that can tolerate elevated levels of nitrate at 30 ppm or more.

Very low levels of nitrate are critical for many saltwater reef aquariums, as nitrate can cause damage and possible death to certain delicate corals and invertebrates. For this reason, the HI781 offers unmatched precision in the measurement of very low levels of nitrate (0.00 to 5.00 ppm). For freshwater samples, Hanna Instruments recommends using the HI97728 Nitrate Portable Photometer.