Extech DO700 Portable Dissolved Oxygen Meter
9-in-1 Meter with Lab Performance

  • Measures Dissolved Oxygen concentration/saturation, pH, mV, Conductivity, TDS, Salinity, Resistivity and Temperature
  • Automatic salinity compensation and manual barometric pressure compensation for DO measurements
  • One button pH calibration (4, 7, and 10pH)
  • Choice of 3 point pH calibration for better accuracy
  • One point Conductivity calibration - automatically recognizes 8 calibration solutions from USA, Europe and China series
  • Automatic Temperature Compensation (non-linear compensation for purified water <10µS/cm to improve measuring accuracy)
  • Memory stores up to 400 readings with series number, measured value and temperature
  • Large blue backlit dual LCD display
  • Auto power off saves battery life with disable function
  • Waterproof housing
  • Complete with DO probe, pH/mV/Temp electrode, polymer Conductivity cell, pH and Conductivity calbration solutions, batteries and hard carrying case
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9-in-1 Meter with Lab PerformanceClick for larger image
Extech DO700 Shown

Product Information
Datasheet 259 KB PDF
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Function Range Resolution Accuracy
Dissolved Oxygen concentration 0 to 40.00mg/L 0.01mg/L ±1.5%FS
Dissolved Oxygen saturation 0 to 200.0% 0.1% ±1.5%FS
pH -2.00 to 19.99pH 0.01pH ±0.02pH
mV -1999 to + 1999mV 1mV ±0.15mV
Conductivity 0.00 to 199.9mS 0.01μS ±1.5%FS
TDS 0 to 100g/L 0.0mg/L ±1.5%FS
Salinity 0 to 100ppt 0.01ppt ±1.5%FS
Resistivity 0 to 100MΩ . cm 0.1Ω ±1.5%FS
Temperature (pH and mV) 32 to 212°F (0 to 100°C) 0.1° ±1°F/±0.5°C
Temperature (other) 32 to 122°F (0 to 50°C) 0.1° ±1°F/±0.5°C
Power Two AA Batteries
Dimensions/Weight 4.7x2.6x1.2" (120x65x31mm)/6.3oz (180g)
Ordering Information
Model Description Buy Online Price
DO700 Extech DO700 Portable Dissolved Oxygen Meter Kit. 9-in-1 Meter with Lab Performance Buy Now Sale $649.00
(Reg. $799.00)
Included Accessories
  • (1) Dissolved Oxygen Probe
  • (3)Membrane caps and DO internal fill solution
  • (1)pH/mV/Temperature Electrode
  • (1)Polymer Conductivity Cell
  • (1)Conductivity Calibration Solution
  • (1)pH Calibration Solutions
  • (2)AA Batteries
  • (3)Carrying Case
Optional Accessories
Model Description Buy Online Price
DO705 Extech DO705 Dissolved Oxygen Electrode For Extech Model DO700 Buy Now Sale $209.99
(Reg. $239.99)
DO703 Extech DO703 Membrane Caps, 3 Caps For Extech Model DO700 Buy Now Sale $46.79
(Reg. $69.99)
PH305 Extech PH305 pH/mV/Temperature Electrode For Extech PH300, EC600, and DO700 Kits Buy Now Sale $43.79
(Reg. $69.99)
EC605 Extech EC605 Conductivity Cell For Extech Models EC600 and DO700 Buy Now Sale $81.69
(Reg. $104.99)

*NOTE: Items ordered with optional NIST calibration will require
approximately 10 days to complete the certification.