Dissolved Oxygen,
Meters, Probes, Transmitters, Controllers
 
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 multiparameter electrochemistry instruments also see the conductivity section here

Dissolved Oxygen Transmitter
Analog output
Local LCD display
Dissolved Oxygen Transmitter Deep submersible for salt or fresh water up to 30 m depth. Analog output
DO electrochemistry meter DO_C534
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.
 Dual input Dissolved Oxygen
/ pH / temperature / mV / conductivity

Internal memory, data storage 300 readings, rechargeable batteries. galvanic probe.
 Stainless steel sterilizable galvanic DO probe Delrin Lab and Inline Dissolved Oxygen Electrodes
electrochemistry controller
Dissolved Oxygen
Handheld meter, inexpensive kits, RS232 included.
Electrochemistry Controller
Monitor on/off and proportional controller for Conductivity, pH, mV, DO and temperature
Model C3030 Multi-parameter
High resolution conductivity / resistivity / pH / Ion, meter Dissolved Oxygen
  • Multimeter
  • 2 pH/mV/Ion channels / differential pH
  • 1 conductivity
  • 1Dissolved Oxygen
  • 1 temperature
  • Ideal for low conductivity applications such as de-ionized water
  • Data logging
  • USB
  • Analog outputs
Model C3020 Multi-parameter
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
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