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American Marine is proud to introduce the PINPOINTTM Nitrate Monitor. The only truly affordable and accurate digital Nitrate measurement instrument engineered for marine saltwater. The PINPOINTTM 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 (9 volt battery not included). *Please Note: For use with saltwater only.