Hanna Instruments HI96786C Cal Check Nitrate Portable Photometer, 7-19/32" Length x 4-3/32" Width x 2-11/16" Height, 0.0 to 100 mg/L, 1 mg/L Resolution, LCD Display, 9V

Nitrates are present in nature as a result of decomposition of organic microorganisms or due to their use as fertilizers. Nitrates reduce to nitrites, which in turn easily combine to form substances dangerous to man. A maximum level of 45 milligrams per liter (ppm) is established as a worldwide guideline for nitrate concentration in water. In Europe, the maximum consented level of nitrates in potable water is 50.0 milligrams per liter (ppm), while in the USA the EPA has established a guideline for the maximum level of nitrate-nitrogen of 10 milligrams per liter (NO-3-N), which corresponds to 45.0 milligrams per liter of nitrates. The HI 96786 meter measures the nitrate content in water and wastewater. This meter uses an exclusive positive-locking system to ensure that the cuvette is in the same place every time it is placed into the measurement cell. HI 9786C include photometer, sample cuvettes with caps 2 each, 9V battery, scissors, cloth for wiping cuvettes, instrument quality certificate, instruction manual and rigid carrying case.0.0 to 100 milligrams per liter range. 1 milligrams per liter resolution. Accuracy at the rate 25 degree C: +/-5 milligrams per liter +/-5 percent of reading. Light source: tungsten lamp. Light Detector: silicon photocell with narrow band interference filter at the rate of 525 nm. Power supply: 9v battery. Auto-off: after ten minutes of non-use in measurement mode; after one hour of non-use in calibration mode; with last reading reminder. Environment: 0 to 50 degree C (32 to 122 degree F); RH max 95 percent non-condensing. Measures 7-19/32" length by 4-3/32" width by 2-11/16" height. Weight: 12.7 oz. Method: adaptation of cadmium reaction method.