Online Ozone Analyzer for Water QualityThe core is to capture the real-time ozone concentration signal in water samples through specific detection methods and convert it into readable values. The mainstream detection principles are divided into the following three categories:
UV absorption method
This is a commonly used standard method. Ozone has a characteristic absorption ability for ultraviolet light with a wavelength of 254nm, and the absorbance is proportional to the concentration of ozone. The analyzer is equipped with a built-in ultraviolet light source, and the light beams pass through the reference light path and the water sample light path respectively. By detecting the intensity difference between the two light paths and combining with Lambert Beer's law, the real-time concentration of ozone in the water sample is calculated. This method has strong stability, no reagent consumption, and is suitable for online continuous monitoring.
electrochemical method
Design based on the redox characteristics of ozone. The sensor electrode of the analyzer is immersed in the water sample, and ozone reacts with specific substances on the electrode surface to produce a concentration dependent current signal. The instrument amplifies and converts the current signal, and outputs the corresponding ozone concentration value. This method has fast response speed and small equipment size, but the electrodes are prone to contamination by impurities in water and require regular calibration and maintenance.
Colorimetric method (indigo method)
Belonging to chemical detection method, it utilizes the fading effect of ozone on indigo dye. The analyzer automatically adds indigo reagent to the water sample, and ozone will destroy the molecular structure of the dye, causing a decrease in the absorbance of the solution. By detecting the change in absorbance, the ozone concentration can be converted. This method has high accuracy, but requires continuous consumption of reagents, and is often used for high-precision calibration or laboratory comparison.