Be aware: You cannot use this product without an eXact photometer.
The eXact® Strip Micro Calcium Ultra High Kit for eXact Photometers 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 THU strips and and (2) dropper bottles with THU liquid reagent for 25 tests (50 total).