DPD Pro minimizes steps for pros
By Jim Raposa
The genius of the DPD Pro dip-and-read test strip for public pools and spas from Hach, is in its simplicity. Hach has made the complexity of water testing so easy, it’s no wonder the interest level from end users, health professionals and public pool maintenance professionals has skyrocketed since DPD Pro was released earlier this year. The reason is almost deceptively easy, the strips minimize the number of steps required for water testing and eliminates the need for counting drops and diluting high range samples. It’s dip and read testing at its best.
You might ask what took so long for this to come to market? Lara Winter, Associate Product Manager at Hach, says the company prefers to take a little extra time to make sure they’ve done their homework. “We follow a vigorous product development process, which requires a clear understanding of the market. During this process, we focus on customer requirements so we can properly meet their needs when we release a product.” As part of this internal process, the folks at Hach also knew how important it would be for DPD Pro to receive the NSF 50 designation, to immediately establish its credentials in the area of public recreational water management. This is the first such strip to be NSF (National Sanitation Foundation) certified for publicly accessed swimming pools.
The DPD Pro kit comes with two bottles of test strips. As Winter explains, “If you start with the three-way test strip, dip it into the water deep enough for all the pads to get submerged, then remove the strip from the water and compare the strip to the color chart. It takes about 30 seconds to obtain results. On the four-way strips, you get results in about 15 seconds.” The three-way strips test Free Chlorine and Total Chlorine using the N, N-Diethyl-p-Phenylenediamine (DPD) method and phenol red for pH. The four way strips test for Low-range and High-range total hardness (all the way up to 1000 ppm), Cyanuric Acid and Total Alkalinity. If any chemical adjustments are made to the water after DPD testing, it is suggested the water be retested after four hours, or one turnover cycle.
Hach has made the DPD Pro test strip kit tech friendly with their DPD Pro smartphone app, free on Google Play store and iTunes. The app offers a practical method for logging and tracking water test results, which can be exported for complex analysis and graphing test results over time. This makes it easier to identify commercial pools or commercial spas requiring extra attention. The app will also create a Saturation Index graph, which automatically calculates values. This detail is an invaluable record of your water testing routine.
It’s worth noting that the DPD Pro test strip and kit is designed for exclusive use by pool and spa professionals and managers of public water pools and spas. “For busy pool service professionals,” says Winter, “DPD Pro makes their life easier. Time is money and income is directly correlated to the number of pools which can be serviced in a day or week. Depending on how proficient someone is with a standard liquid test kit (and how many tests are being performed) the average time savings alone with the DPD Pro test kit is ten minutes per pool. That time savings has a specific dollar value to for each service professional. Add the DPD app, which can track up to 200 different pools and spas and the fact that those test results, with photos, can be e-mailed to customers and the DPD Pro test kit can help public pool and spa service professionals add greater value to their customer relationships.”