CHEMets Dissolved Oxygen Test Kit Refill, Provides results in two minutes or less, Pack of 30

Details

Designed for maximum simplicity and accuracy, Chemets 7 mm diameter ampules feature tapered, prescored tips with reagent vacuum-sealed insideTo perform a test, simply immerse Chemets ampule in the sample, snap off tip and the correct sample volume is quickly drawn inside the ampuleIn two minutes or less, the reaction between the sample and reagent yields a color—which can then be compared to appropriate color standard for quantification of resultsComparators have two-year shelf life