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  • 0 to 40.00mg / L dissolved oxygen concentration
  • 0 to 200.0% dissolved oxygen saturation
  • -2.00 to 19.99 pH
  • -1999 to 1999 mV
  • 0.00 to 199.9 mV
  • 0.00 to 199.mS conductivity
  • 0 to 100g/L TDS
  • 0 to 100 ppt salinity
  • 0 to 100MΩ cm resistivity
  • Memory stores up to 300 readings

What's in the Box

  • Dissolved oxygen probe
  • 3 membrane caps
  • DO internal fill solution (30mL)
  • pH / mV / temperature electrode
  • Polymer conductivity cell
  • pH calibration solutions (4, 7 and 10pH)
  • Conductivity calibration solution (1413µS)
  • 2 AA batteries
  • Hard carrying case

The Extech DO700 portable dissolved oxygen meter has automatic salinity compensation and manual barometric pressure compensation for DO measurements. The waterproof housing meets IP57 standards. The Extech DO700 portable dissolved oxygen meter has one button pH calibration (4, 7 and 10 pH) and a choice of 3 point pH calibration for better accuracy. One point conductivity calibration automatically recognizes 8 calibration solutions. The Extech DO700 portable dissolved oxygen meter has automatic temperature compensation (non-linear compensation for purified water, less than 10µS/cm to improve measuring accuracy).

The Extech DO700 portable dissolved oxygen meter's memory stores up to 400 readings with series number, measured value and temperature. The meter has a large blue backlit dual LCD display. The auto power off function saves battery life and also has a disable function.


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pH buffers for calibrating your Extech pH meter
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Please consider these optional accessories.