Nitrogen, Ammonia, powder pack reagent, pack of 100.

Range: 0.01 - 0.50 mg/L NH4-N; 0.01 - 0.64 NH4. NH3-N and NH3 can be calculated with pHotoFlex pH and a connected pH/temp external probe (range is temperature and pH dependent). pHotoFlex STD can calculate NH3 via multiplier.