Dissolved oxygen refers to the amount of oxygen dissolved in the water, it is one of the important indicators of the survival of aquatic organisms in the water, but also an important indicator of the degree of pollution of the water body. Dissolved oxygen is too low, indicating that the self-purification ability of the water body is low, the degree of pollution is high, for example, when the water is contaminated by organic matter, oxygen consumption is high, dissolved oxygen can not be timely replenishment, thus breeding anaerobic bacteria, the corruption of organic matter will make the water body blackened and smelly. Generally speaking, the content of dissolved oxygen in the water is required to be not less than 2mg/L (national standard V water).

At present, there are online and portable ways to measure dissolved oxygen, online dissolved oxygen meter can monitor the value of each time period, but each instrument can only be installed in a fixed place, if you want to change a place to measure, it is not convenient enough to use, then the portable dissolved oxygen meter can play its advantage. It is suitable for on-site testing, as well as regular or irregular testing. The following is to introduce one of our dissolved oxygen tester.

According to Winkler's principle, the dissolved oxygen content in solution is analysed and determined photometrically with the Dissolved Oxygen Tester PF-12plus, which is able to achieve the purpose of measuring water quality efficiently and accurately.