In the permanent section about professional devices, we will tell you about the oximeter.

 An oximeter is a device specifically designed to measure the concentration of dissolved oxygen in water and other liquids. The method of operation of oximeters is based on electrochemical analysis of oxygen concentration.
To date, there are many modifications of these devices: stationary and portable, narrowly focused models for industrial use, etc. All of them differ in the permissible standard deviation, sensitivity threshold, and measurement range.
With the development of technologies, it became possible to use self-diagnosis, analysis and monitoring of the process, memory for measurement results in portable oximeters.
The oximeter is necessary in industry, in genetic engineering, for monitoring the operation of sewage treatment plants, environmental and epidemiological analyses, for laboratory research and much more.