Fluorescence dissolved oxygen analyzer is a water quality monitoring device based on the principle of fluorescence quenching, mainly used to measure the concentration of dissolved oxygen (DO) in water bodies, widely used in water environment monitoring, sewage treatment, aquaculture and other fields.
Core function: Generate red light by exciting fluorescent substances with blue or green light, and quantitatively analyze the inverse relationship between oxygen molecule concentration and red light intensity or phase difference. No need to replace the membrane or electrolyte, it has the characteristics of maintenance free, strong anti-interference ability, and fast response.
Detection principle: Fluorescence dissolved oxygen analyzer is a method that uses the absorption relationship between oxygen and fluorescent substances to determine the oxygen content in a sample. By exciting fluorescent substances in the sample, the presence of oxygen can cause quenching of the fluorescent substances. The oxygen content in the sample is calculated based on the change in fluorescence intensity.
Application field: Fluorescence dissolved oxygen analyzer is widely used in the field of environmental monitoring, which can be used to determine the oxygen content in water, atmosphere, etc., and judge the oxidation-reduction ability of samples. In water quality monitoring, fluorescence based dissolved oxygen meters can also be used to determine the dissolved oxygen content in water, providing important data support for water quality assessment and management.
Main Features
Measurement range: 0-20mg/L, covering various types of water bodies from freshwater to seawater
Anti interference: not affected by pH, hydrogen sulfide, heavy metals, etc., especially suitable for environments with complex water quality
Low maintenance cost: No need for frequent calibration or component replacement, maintenance cycle up to 2-3 years
Response speed: Results can be obtained within 10 seconds after contact with water, suitable for detecting sudden hypoxia events
Compared to traditional dissolved oxygen detection methods, fluorescence based dissolved oxygen meters have advantages such as fast response speed, high accuracy, and easy operation. Due to its absence of chemical reagents and minimal impact on the sample, it is more environmentally friendly and energy-efficient.
The sensor surface is covered with black light blocking material to avoid interference from sunlight and other fluorescent substances in the water; Polyester foil allows gas molecules to pass through but blocks liquids, eliminating flow rate requirements; The membrane free design avoids cross interference of chemicals such as hydrogen sulfide and chloride ions.