(IP 67)The Oxi 3310 is a top of the line portable meter for dissolved oxygen with a modern, user-friendly user interface. The output of the measured results is either as concentration, saturation or partial pressure. It has an interval-driven data logger and memory for 5, 000 entries - ideal for the automatic data collection on site. If desired, you can calibrate against external standards such as reference sensors or Winkler titration.