Hanna HI96728 Nitrate Nitrogen Portable Photometer Nitrate Range 0.0 to 30.0 mg/L (ppm) NO₃-N (nitrate-nitrogen) Nitrate Resolution 0.1 mg/L (ppm) Photometer/Colorimeter Light Detector silicon photocell with narrow band interference filter @ 525 nm Battery Type/Life 9V battery Automatic Shut-Off after ten minutes of non-use in measurement mode; after one hour of non-use in calibration mode; with last reading reminder Show More Show Less
