Extech Waterproof DO/pH/Conductivity Meter Kit

The Extech Waterproof DO/pH/Conductivity Meter performs automatic salinity compensations and manual barometric pressure compensation for measurements.


  • One button pH calibration (4, 7, and 10pH)
  • Choice of 3 point pH calibration for better accuracy
  • Memory stores up to 400 readings
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The Extech Waterproof DO/pH/Conductivity Meter measures dissolved oxygen concentration/saturation, pH, mV, conductivity, TDS, salinity, resistivity, and temperature. The automatic salinity compensation and manual barometric pressure compensation are for dissolved oxgyen measurements. Users have the choice of 3 point pH calibration for better accuracy, with one button pH 4, 7, and 10 calibration. The one point conductivity calibration automatically recognizes 8 calibration solutions. The memory stores up to 400 readings with series number, measured value, and temperature.

  • Dissolved oxygen range: concentration: 0 to 40.00mg/L; saturation: 0 to 200.0%
  • pH range: -2.00 to 19.99pH
  • mV range: -1999 to + 1999mV
  • Conductivity range: 0.00 to 199.9mS
  • TDS range: 0 to 100g/L
  • Salinity range: 0 to 100ppt
  • Resistivity range: 0 to 100MΩ ⋅ cm
  • Temperature ranges: 32 to 212°F (0 to 100°C), pH and mV, 32 to 122°F (0 to 50°C), all other ranges
  • Resolution: 0.01m/gL, 0.1%, 0.01pH, 1mV, 0.01μS, 0.1°
  • Accuracy: ±0.02pH; ±0.15mV; ±1.5%FS; ±1°F/±0.5°C
  • Power: two AA batteries
  • Meter dimensions: 4.7 x 2.6 x 1.2" (120 x 65 x 31mm)
  • Meter weight: 6.3oz (180g)
  • Kit dimensions: 14 x 10.75 x 3” (355.6 x 273 x 76.2mm)
  • Kit weight: 3.75lbs (1.7kg)
  • (1) DO700 meter
  • (1) Dissolved oxygen probe
  • (1) Polymer conductivity cell
  • (1) pH/mV/temperature electrode
  • (3) DO membrane caps
  • (1) Cathode polishing paper
  • (1) 30mL bottle of DO internal fill solution
  • (1) 50mL bottle of 1413μS/cm standard
  • (1) 50mL bottle of pH 4 buffer
  • (1) 50mL bottle of pH 7 buffer
  • (1) 50mL bottle of pH 10 buffer
  • (1) Screwdriver
  • (2) AA batteries
  • (1) Hard-sided carrying case
Questions & Answers
Do I need to calibrate my meter before I use it?
The DO700 comes calibrated from the factory and can be used immediately upon arrival.
How often should I calibrate my meter?
It is recommended to calibrate once a month.
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Extech Waterproof DO/pH/Conductivity Meter Kit
Waterproof DO/pH/Conductivity meter with DO probe, conductivity cell, pH electrode, calibration solutions, accessories and carrying case
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