The Hach DR 900 Portable Multiparameter Colorimeter is a high-quality testing device designed for measuring various parameters such as pH, conductivity, and TDS levels. Made by the reputable brand Hach in the United States, this portable unit offers accurate and reliable results for your testing needs. With its compact and easy-to-use design, the Hach DR 900 is a versatile tool for both industrial and professional applications.