Dissolved Oxygen,
Meters and Probes
 
Dissolved Oxygen is a measure of the free oxygen dissolved in water. It is an indicator of water quality. The amount of oxygen that can be held by the water depends on the water temperature, salinity, and pressure. Gas solubility increases with decreasing temperature (colder water holds more oxygen). Gas solubility increases with decreasing salinity (freshwater holds more oxygen than does saltwater). Both the partial pressure and the degree of saturation of oxygen will change with altitude . Finally, gas solubility decreases as pressure decreases. Thus, the amount of oxygen absorbed in water decreases as altitude increases because of the decrease in relative pressure.
   For DO water quality monitors also see the conductivity section here
   
 DO electrochemistry meter  High Resolution Dissolved Oxygen Meter
Multi purpose electro-chemisty meter analogue recorder, data logging, 12000 reading internal memory, Windows software, USB, rechargeable batteries. GLP Reporting, Galvanic probe.
   
DO_C534 Dual input Dissolved Oxygen
/ pH / temperature / mV / conductivity

Internal memory, data storage 300 readings, rechargeable batteries. galvanic probe.
   
   
Dissolved Oxygen
Jenco handheld meter, inexpensive kits, RS232 included.
   
 
electrochemistry controller Electrochemistry Controller
Monitor controller for Conductivity, pH, mV, DO and temperature
   

Model C3030
High resolution conductivity / resistivity / pH / Ion, meter Dissolved Oxygen

  • Multimeter
  • 2 pH/mV/Ion channels / differential pH
  • 1 conductivity
  • 1 Dissolved Oxygen
  • 1 temperature
  • Ideal for low conductivity applications such as de-ionized water
  • Data logging
  • USB
  • Analog outputs

Model C3020
High resolution conductivity / resistivity / pH /mV meter
Dissolved Oxygen

  • Multimeter
  • 2 pH/mV/ channels / differential pH
  • 1 conductivity
  • 1 Dissolved Oxygen
  • 1 temperature
  • Data logging
  • USB
  • Analog outputs
 
 CS D230
 Electrochemistry
 data logger up to 28 channels, DO, conductivity, pH
Stainless steel sterilizable galvanic DO probe  
Delrin Lab and Inline Dissolved Oxygen Electrodes
   
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