Nitrates are present in nature as a result of the decomposition of organic micro-organisms or due to their use as fertilizers. Nitrates reduce to nitrites, which in turn easily combine to form substances dangerous to man. The EPA has established a guideline for the maximum level of nitrate nitrogen of 10 mg/L, which corresponds to 45.0 mg/L of Nitrates. This unit measures from 0 to 30 mg/L of nitrate nitrogen. Normal battery life extends through 300 measurements. Supplied complete with 2 cuvets, caps, 9V battery and instruction manual.
