| Dissolved Oxygen 
The portable YSI 52 is easy to use for field and lab work. An easy-to-read LCD provides clear, simultaneous display of time, temperature, % saturation and mg/L oxygen. Six D-cell batteries provide 100 hours of operation. Use the Model 52 in the field with the field-proven 5739 dissolved oxygen sensor and connect a 5905 BOD probe in the lab to complete all of your lab testing. It's as simple as changing cables! The YSI 58 is a proven field and laboratory instrument. The 58 displays oxygen concentrations in two temperature-compensated modes. The instrument offers manual salinity correction, recorder output, and operation from line power or batteries. The case also holds additional batteries for an optional DO field stirrer.
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