• DO % Air Saturation
    • Measurement range: 0 to 200%
    • Resolution: 0.1% air saturation
    • Accuracy: ±2% of the reading or ±2% air saturation
  • DO ppm (mg/L)
    • Range: 0 to 20 ppm
    • Resolution: 0.01 ppm
    • Accuracy: ±2% of the reading or ±0.2ppm
  • Temperature
    • Measurement range: -6 to 46°C (21 to 115°F)
    • Resolution: 0.1°C
    • Accuracy: ±0.3°C ±1 digit
  • Salinity compensation: 0.0 to 40.0 ppt
  • IP65 water resistant / splash-proof
  • 9V Battery (included)


The YSI EcoSense DO200 measures dissolved oxygen and temperature. It has an easy-to-use interface, one-handed operation, water resistant case, and a low cost of ownership over the life of the product.

YSI DO200 meters feature water-tight housing, automatic temperature compensation, manual salinity compensation, low battery indicator, screw-on cap membranes with low stirring/fast response and manual pressure compensation. The meter is available in a standard version with units in °C (and mbar for pressure compensation) or a US version with readings in °F (and inHg for pressure compensation).

The DO200 is designed for quick, accurate results in an economical platform. The ability to measure DO and temperature in a simple, compact instrument allows the instrument to be used in multiple application sampling strategies including laboratory BOD testing with the optional BOD probe.

The YSI DO200 is available as the meter only, or in a kit version with meter, probe with 4 or 10 meter cable assembly, and hard case.