31/1/2020 · LCK1914 - COD cuvette test for saltwater (seawater), 70-700 mg/L O2. Hach is excited to announce the launch of LCK1914 COD in saltwater (High Range). LCK1914 enables testing of COD concentrations from 70 – 700 mg/L in water samples with very high chloride concentrations up to 20.000 mg/L. Safety at work - no direct contact with toxic reagents