Project Description

Aquaculture Special Online Optical Dissolved Oxygen Sensor

WODO series aquaculture special fluorescence dissolved oxygen sensor, specially tailored for aquaculture market, using our self-developed fluorescent materials. No oxygen consumption, no flow rate limitation, no electrolyte required, no maintenance and calibration, strong anti-interference ability, excellent stability. Built-in temperature sensor, automatic temperature compensation. RS485 output, can be networked without a controller.

Optical Dissolved Oxygen Sensor Feature

  • Digital sensor, RS485 output, support MODBUS

  • No membrane, no electrolyte, no interference, no frequent calibration

  • No oxygen consumption, no flow restriction

  • Specially tailored for aquaculture market, with super high cost performance.

Principle of Operation

Fluorescence dissolved oxygen sensor is based on the quenching principle of active fluorescence by specific substances in physics. Blue light from a light emitting diode (LED) illuminates the fluorescent material on the inner surface of the cap, fluorescent substances on the inner surface are stimulated, glowing red light, by detecting the phase difference between red and blue light and comparing with the internal calibration value, the concentration of oxygen molecule can be calculated, and the final value can be automatically compensated by temperature and pressure.


  • Avoid exposing the inner surface of the fluorescent cap to sunlight.
  • Please do not touch the fluorescent membrane with your hand.
  • Avoid applying any mechanical stress (pressure, scratches, etc.) directly to the fluorescent membrane during use.

Technical Parameters

NameTechnical Specification
Measuring PrincipleFluorescence Method
Measuring Range0~20mg/L or 0~200% saturation
Response Time40 S
Sensor Drift<3% per year
Temperature SensorNTC
Temperature Range0 ~ 50℃
Temperature Accuracy±0.5℃
Protection GradeIP68
Maximum Operating Pressure6 bar
Sensor InterfaceSupport RS-485, MODBUS protocol
Power InformationDC 6~12V, current <50mA
Sensor DimensionΦ23*188.3
Sensor Cable Length10 meters (default), can be customized
CalibrationOne point or two points calibration
Fluorescent Cap LifeGuaranteed to use for one year (under normal use)
Shell Material316L Stainless Steel

Related  Online Dissolved Oxygen Sensor