Nitrogen, Ammonia LR (low range) vial reagent, for up to 49 tests.

Range: 0.03 - 3.2 mg/L NH4 or 0.02 - 2.5 mg/L NH4-N. 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.