American Marine is proud to introduce the Pinpoint Nitrate Monitor. The only truly affordable and accurate digital Nitrate measurement instrument engineered for marine saltwater. The Pinpoint Nitrate Monitor has been designed as a precision spot-testing instrument. There are 2 independent measurement ranges: Low Range is 1–10 ppm nitrate and High Range is 10–100 ppm nitrate. Resolution is 1 ppm in either scale. Accuracy is 1 ppm after calibration. The Pinpoint Nitrate Monitor is sold complete with meter, probe and all calibration fluids. Powered by a 9 volt battery (not included) or optional AC Adaptor (check box below.)