Highly Purified Water For Accurate And Reproducible Test Results Water is irreplaceable for functioning of your analyzer. Therefore, the water quality has direct impact on the quality of test results. The OP water treatment systems combine reverse osmosis for effective removal of contaminants with water deionization via ion exchanger resins. The combination of these purification technologies assures a constant and reliable supply of water of highest quality. Your Benefits OP water treatment systems are the perfect balance between quality and economy featuring high quality membranes, prefiltration for membrane protection, and manometric and conductometric controls for easy system monitoring. Further advantages are low running costs and easy maintenance.