HI97728 / HI 97728 Nitrate Portable Photometer

HI97728 / HI 97728 Nitrate Portable Photometer

In domestic water, nitrate is monitored due to the health effects that it has on newborn babies. High level of nitrates can cause a condition known as methemoglobinemia or "blue-baby syndrome". The EPA has set the maximum contaminant level in water at 10 mg/l. The HI97728 uses cadmium reduction method for measuring nitrate up to 30.0 mg/L (ppm) in water from 0.0 to 30.0 mg/L.

The method uses a reagent with cadmium to reduce the nitrate in the water to nitrite. In an acidic medium the nitrite ion reacts with sulfanilic acid to form a salt that reacts with other reagents to produce a colored solution that is proportional to the concentration of nitrate that was in the sample.

The HI97728 has an innovative optical system that offers superior performance in accuracy, repeatability, and the short amount of time it takes to perform a measurement. This compact, waterproof meter is extremely user friendly with a tutorial mode that walks the user graphically, step by step, in performing a measurement. The use of a backlit dot matrix LED allows the use of virtual keys which makes the operation of the meter very intuitive including selecting different units of measure, reviewing GLP data, recalling the last 50 measurements, and customizing the meter to user preferences.

HI97728 is completely waterproof including the cuvette holder that is designed with ridges to protect the optical path from getting scratched by the cuvette and a gasketed battery compartment that holds three common AA batteries. The compact design fits comfortable in the hand for use in the field or on a table for benchtop use. The LCD is 71 mm (2.75") by 37 mm (1.6") and is backlit for easy viewing under all conditions