This test method involves adding a standardized reagent to a measured sample until a color change occurs. Again, the volume of standardized reagent used to produce the color change is proportional to the concentration of the chemical being tested. Electronic tests have been developed to test a wide range of water parameters. They allow you to use a special electrical probe or electrode to test the water sample, which then displays the results on an electronic meter. Test strips also have been developed for any number of water chemistry conditions.
Users simply dip the strip directly into the pool or spa water.
The strip changes color, which can be compared to an accompanying color chart for a variety of water parameters. Accurate water testing is really the service technician's lifeblood, and the proper use of test kits and equipment will serve as a guide for your total maintenance program. While many service professionals have adopted the newer technologies of test strips or electronics to speed up and simplify their testing procedures, the majority of technicians continue to rely on reagents, color comparators and test cells to tells them about their pools' condition. With this in mind, we've again sought out the able of assistance of test-kit manufacturer Taylor Technologies. This is usually an indication of too much chlorine in the water, causing the DPD to bleach out.