Optical Dissolved Oxygen Sensor



  • Industrial and municipal sewage treatment plants: Regulating tank, aeration tank, aerobic/anaerobic digestion tank and effluent monitoring.
  • Water environment monitoring: Rivers, lakes, sea water, fishing grounds, etc.
Products Categories


  • Fluorescent film has scratch resistance, not easy to damage, easy to clean and maintain the film.
  • Hardware and software performance is improved. High measurement accuracy.
  • Light source, detector and other key components are imported to ensure the stability and reliability of product performance.
  • Small size, low power consumption, easy to integrate.
  • Anti-reverse connection protection for positive and negative terminals of the sensor power supply.
  • Prevent incorrect cable connections to the sensor RS485 A/B.

Product Description

The FDO-99 series fluorescent method dissolved oxygen sensor is a product designed for water environment monitoring and sewage treatment. Adopting advanced fluorescence quenching principles and accurate phase detection techniques and innovative packaging processes, the reliability and service life of the product are greatly improved. Its long -term low drift and maintenance-free characteristics make the product better than the traditional membrane electrode.


  • Measuring range: dissolved oxygen 0 ~ 20mg/L, Saturation 0 ~ 120%
  • Resolution: 0.01mg/L
  • Operating temperature: -10 ~ 55℃
  • Protection level: IP68
  • Power supply: DC12 ~ 24V, 0.2W
  • Output: RS485 Modbus.
  • Cable length: Standard 10m (customizable)
FDO-99SH general type FDO-99SS Marine special FDO-99E Aquaculture
Application General industrial process, sewage treatment, environmental monitoring. Marine environment Fresh or Brackish water aquaculture ponds.
Accuracy DO: ±1%F.S

Temp: ±0.5℃

DO: ±1%F.S

Temp: ±0.5℃

DO: ±2.5%

Temp: ±0.5℃

Response time <90S <90S <90S
Working pressure <0.2Mpa <0.2Mpa 0.1Mpa
Film life 2 years 1 year 1 year
Housing material SS316L Titanium alloy POM
Install method ¾”NPT thread ¾”NPT thread ¾”NPT thread
Probe size φ41×140mm φ41×140mm φ32×155mm
Weight 1000g 900g

1688详情页 溶解氧 01

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1688详情页 pH 10 1



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