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Dissolved oxygen controller

Dissolved oxygen meter

1. Membrane (polarography) / Fluorescence
2. Fish farm/pond
3. Multiple electrode available

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Dissolved Oxygen Meter is one of the intelligent online chemical analysis instruments. It is widely used in continuous monitoring of dissolved oxygen, saturation, oxygen partial pressure and temperature .The continuous monitoring data is realized by remote transmission monitoring and recording through the transmission output connection recorder. It can also be connected to the RS485 interface and can be easily connected to the computer for monitoring and recording through the MODBUS-RTU protocol.

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★  Can do DO / SAT / OPP / temperature measurement

★ Can set high and low alarm function

★ Isolated transmission output, less interference

★ Configurable temperature manual, automatic compensation function



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Dissolved Oxygen Meter is widely used in continuous monitoring of dissolved oxygen, saturation, oxygen partial pressure and temperature in thermal power, chemical fertilizer, metallurgy, environmental protection, pharmaceutical, biochemical, food and tap water solutions.


Dissolved Oxygen Meter: Controller+Electrode----We have two models

GWQ-DO280 membrane dissolved oxygen meter:  (electrochemical method) Under the action of pressure, dissolved oxygen passes through the separator and redox occurs. In response, the oxygen concentration was measured by measuring the resulting diffusion current.

GWQ-DO290 Fluorescence dissolved oxygen meter: blue light is irradiated on the fluorescent substance to excite the fluorescent substance and emit red Light,because oxygen molecules can take away energy (quenching effect), so the The time and intensity of red light is inversely proportional to the concentration of oxygen molecules. Excitation by measurement The phase difference between the red light and the reference light is compared with the internal calibration value, so that it can be calculated, Calculate the concentration of oxygen.



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Why choose us?

We have the pleasure of introducing ourselves to you as a professional factory in the export of water quality analyzer,  Our activities cover a wide range of commodities, such as ph meter, dissolved oxygen meters,  conductivity meter etc.  Our products are superior in quality and moderate in price and are sure to be saleable in your market.  We have been engaged in the water quality measurements business with many countries for many years.  And in a very good position to supply most grades of ph meter at competitive prices and for good delivery.


If you have any questions, please contact us▼.

Measuring principleMembrane (polarography)

Fluorescence method

Supporting electrodeGEC-DO2801

GEC-DO2901(for fresh water)

GEC-DO2902(for sea water)

Measuring range

Oxygen content:0~20mg/L 


Oxygen partial pressure:0~400hPa

Oxygen content:0~20mg/L 





Oxygen content:0.01mg/L 


Oxygen partial pressure:1hPa

Oxygen content:0.01mg/L 


Temperature range-10~+60℃0~45℃
 Correction accuracy (temp.)±0.5℃
Temp. measurement typeManual/Auto(NTC10K / PT1000)
Power supplyAC220V±10%,50Hz/60Hz
Relay alarm250VAC/3A
CommunicationRS485(compatible with MODBUS RTU)
Transmitting functionIsolated transmission 4-20mA output, maximum loop 750Ω, 0.1% FS
Opening size