Dissolved Oxygen Analyzer

Oxygen Analyzer: Vasthi Instruments are global leaders in manufacturing of Dissolved Oxygen Analyzer,Gas Analyzer, Gas Detectors, Dew Point Meter, Dew Point Analyzer, Online Dew Point Meter, Portable Dew Point Meter, Particulate Monitors, Stack Gas Analyzers, gas detector, Hydrogen Gas, single gas detector, wireless gas transmitter, wireless gas detector, Hydrogen gas purity, Dissolved Oxygen Analyzer(DO Analyzer) and have been supplying instruments to customers worldwide, Our multidisciplinary team of scientists, physicians, engineers, and regulatory consultants with decades of global experience brings you the quintessential mechanism that provides complete safety accuracy and durability.

Dissolved oxygen Analyzer is based on the physics of specific substances on the activity of fluorescence quenching principle. The blue light from a light -emitting diode (LED) illuminates the fluorescent substance on the inner surface of the fluorescent cap. Dissolved Oxygen Analyzer is to calculate the concentration of oxygen molecules, through the temperature and pressure automatically compensate for the final output value. Dissolved Oxygen analyzer can detect the phase difference between the red and blue light.


Dissolved Oxygen Analyzer has

1. No electrolyte, no polarization.
2. No need to consume oxygen, not affected by the flow rate.
3. Built-in temperature sensor, automatic temperature compensation.
4. Not subject to sulfide and other chemical substances interference.
5. Drift small, fast response, more accurate measurement.
6. Maintenance-free, Longer life cycle, The use of lower cost.
7. Fluorescent cap replacement is simple.
8. RS-485 interface, MODBUS-RTU protocol.

Technical Parameters

[vtftable ]
Model;;;VDO- 200;nn;
Measuring principle;;;Fluores cence m etho d;nn;
Range range ;;;0-20. 00mg/L;nn;
Resolving power;;;0.01mg/L, 0.1° C;nn;
Accuracy;;;±5%F.S., ±0.5° C;nn;
Signal output;;;RS485( Modbus/RTU);nn;
Working conditions;;;0^-45 °C, <0.2MP a;nn;
storage temperature;;;-5^-65°C;nn;
Installation method ;;;3/4″ NPT screw thread, immersion mounting;nn;
Cable length ;;;5m, other lengths c an be custom ized;nn;
Power consumption;;;<1W;nn;
power supply;;;230 V , 50 Hz;nn;
Protection level for sensor;;;IP68;nn;


  • Using three-stage water system, automatic water, in addition to strong water with long-term SO2.. NO.. NO2.. 03 and H2S.
  • Removing with high efficiency removal of CO and hydrocarbon.
  • Produced by dry, clean, stable flow and pressure.
  • Maximum output of zero flow of up 20L/min.
  • Adjustable output pressure is simple.
  • Less day-to-day maintenance can be used as penetration and FID gas furnace cleaning gas can with an external air compressor unattended automatic drainage function.