YSI Pro20 Handheld DO Comparison Vs. YSI 55 Handheld DO

There are many different types of dissolved oxygen sensors commercially available in portable, compact handheld instruments. These instruments allow for rapid and accurate field detection of dissolved oxygen in aqueous solutions. The different types of dissolved oxygen sensing technologies include optical, polarographic, and galvanic. There are advantages associated with each type of sensor; for example, an optical sensor doesn’t require any stirring or water movement for accurate measurements while an electrochemical sensor requires some amount of water movement or stirring. But what if you had two instruments that measured dissolved oxygen with the same sensor technology? What should you consider before making a purchasing decision?

Let’s compare the YSI model 55 and Pro20, www.ysi.com/pro20. Both of these instruments are portable handheld meters and measure dissolved oxygen with a steady-state polarographic sensor. In order to make an educated purchasing decision between the two, it is important to compare the features of the instruments to determine which set of features best meets your needs.