Convenient user interface Manual memory Allows for calibration against external standards (Oxi 3310) The Oxi 3210 is a portable first class dissolved oxygen meter with intuitive, user-friendly interface. Measured values are displayed as concentration, saturation or partial pressure, individual values can also be manually saved and displayed on the screen. Ideal for automatically recording and transmitting large amounts of data: The Oxi 3310 technically corresponds with the Oxi 3210, with the addition of an interval-controlled data logger and memory for 5000 entries – ideal for automatic data collection in-the field.