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For use with eXact Photometers, the eXact Strip Micro Total Iron (TPTZ) incorporates the patented eXact reagent delivery system created by Industrial Test Systems, Inc. which is ideal for technical and non-technical users. By dipping the eXact strip into a photometer cell, the exact amount of reagent is released into the water causing a change in color or turbidity. The change is measured by an eXact photometer giving the user fast and accurate results. Each unit consists of a kit containing (1) bottle of 50 Fe strips and (2) pack of 25 powder reducer packets.