The Fluorescence Dissolved Oxygen Analyser is based on the principle of fluorescence burst to measure the concentration of dissolved oxygen. The working principle is briefly described as follows: a fluorescent substance emits red light after being excited by blue light. As oxygen molecules absorb the energy emitted by the fluorescent substance, the intensity of the red light decreases, i.e. the fluorescence burst phenomenon occurs. By measuring the change in the intensity of the red light and  comparing  it  with  the  fluorescence  burst phenomenon, the concentration of dissolved oxygen can be calculated. Compared with the traditional electrochemical method, the fluorescence method of dissolved oxygen measurement instrument has significant advantages. Firstly, it does not require membranes, electrodes and electrolytes, thus avoiding measurement errors caused by poor maintenance or aging. Secondly, the fluorescence dissolved oxygen meter has higher sensitivity and stability, providing reliable results in low-oxygen environments or when high-precision measurements are required. In addition, the fluorescence method dissolved oxygen meter is characterised by a fast response time and a high degree of automation.

Product Features

✅No electrolyte, strong anti-interference, no need for frequent calibration, no oxygen consumption, no flow requirements.

✅Built-in temperature sensor, automatic temperature compensation.

✅Built-in calibration parameters, accurate calibration before delivery, can be directly installed and used.

✅RS485 output and 4-20mA output. With high and low limit alarm function.

✅Plug and play, easy to operate.

Technical parameters

Name	Online Dissolved Oxygen Analyzer
Model	YCH280
Principle	Fluorescence method
Range	0-20mg/L or 200% saturation
Accuracy	±3%FS
Resolution	0.01mg/L
Linearity	R2 > 0.99
Protection Level	IP68
Output Signal	Support RS-485/Modbus protocol,4-20mA
Operating Temp.	0-50℃
Sensor Installation	Immersion mode
Power Supply	AC 220V
Cable Length	5 meters (default),Customizable
Housing Material	316L/Titanium
Dimension	φ22*152.7mm

Product Advantages