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Bottle contents: 100 Tests Brand: ITS Europe At ITS, we have created our own unique reagent delivery system. This strip form of the eXact® Reagent Micro is to test for Free Chlorine (DPD-1). It’s one of our most popular tests! The strip has the exact amount of dry reagent necessary for the test. This reagent is to be used in conjunction with any eXact® photometer that support the Free Chlorine test. The colour or turbidity change it causes in the water is then calculated by the photometer, giving the user a fast and accurate result. This is easy to use without technical training and gives you lab-quality results.