Dissolved Oxygen Analyzer

Veritcal View
Dissolved Oxygen Analyzer
Model VDO- 200
Measuring principle Fluorescence method
Range range 0-20.00mq/L
Resolving power 0.01mg/L, 0.1C
Accuracy +5%F.S., +0.5C
Signal output RS485(Modbus/RTU)
Working conditions 0^-45C, <0.2MPA
storage temperature -5?-65C
Installation method 3/4
Cable length 5m, other lengths can be customized
Power consumption <1W
power supply 230V,50 Hz
Protection level for sensor IP68

Online Dissolved Oxygen Analyzers

The dissolved oxygen meter is an instrument that continuously measures the concentration of dissolved oxygen in condensate and feed water used in boiler plants. Dissolved oxygen is a major cause of corrosion and deposits and should be monitored continuously.

Working Principle:

Vasthi Make Fluorescence method The dissolved oxygen sensor is based on the physics of specific substances and the fluorescence quenching principle. The blue light from the light-emitting diode (LED) illuminates the fluorescent substance on the inner surface of the fluorescent cap. The fluorescent substance on the inner surface is excited to emit red light. By detecting the phase difference between red and blue light, we can calculate the concentration of oxygen molecules. The temperature and pressure automatically compensate for the final output value.


  • No electrolyte, no polarization
  • No need to consume oxygen, not affected by the flow rate
  • Built-in temperature sensor, automatic temperature compensation
  • Not subject to sulfide and other chemical substances interference
  • Drift small, fast response, more accurate measurement
  • maintenance-free, longer life cycle, the use of lower cost
  • Fluorescent cap for simple replacement
  • RS-485 interface, MODBUS-RTU protocol

Get in Touch

Have a question about our Device? Don’t hesitate to contact us directly using the form on this page or by visiting our office.


Ph. +91 7337418685
Mail. info@vasthi.com

Manjeera Trinity Corporate,
Plot No-112, Survey No:1050,
JNTU, Hitech city Rd, KPHB Colony
Kukatpally, Hyderabad-500072

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