CHEMetrics' self-filling ampoules combine the accuracy and reliability you want with a simplicity and elegance that is not available in other water quality testing methods. CHEMetrics' ampoules deliver a quantitative result you can depend on usually in two minutes or less! You just snap the tip of the ampoule in the sample -- it fills automatically -- then measure the result with an instrument or by comparison with color standards. The time you save translates to $$$$