MeasuringRange 0.5 to 1 mg/l 1 to 18 mg/l 18 to 32 mg/l Number of Pump Strokes 2 1 1/2 CorrectionFactor 1/2 1 by scale SamplingTime 1 minutes per pumpstroke DetectingLimit 0.1 mg/l (n=2) ColorChange Yellowish Green →Purple ReactionPrinciple H2O + Mg(ClO4)2 → Mg(ClO4)2 H2O Coefficient ofVariation 10% (for1 to 6 mg/l), 5% (for 6 to 18 mg/l) ShelfLife 3Years Correctionsfor temperature & humidity Temperature correction is necessary Store the tubes at cool and darkplace.