How to choose a dissolved oxygen analyzer?
1. Basic functions
Dissolved oxygen concentration measurement, dissolved oxygen saturation, and temperature measurement are the basic functions of a dissolved oxygen analyzer.
2. Advanced features
Some advanced features can greatly improve your work efficiency, such as the following:
Automatic temperature compensation function;
Calibration function: Does it support automatic calibration, zero oxygen calibration, full scale calibration, air pressure calibration, and salinity calibration;
Standard solution alarm function: Some instruments have automatic recognition of standard solutions and automatic alarm function: during calibration, if you use the wrong standard solution or spoiled standard solution, it will automatically prompt for errors and protect the original calibration data;
Data management and storage: Storage, deletion, and retrieval of measurement data, and whether the data storage capacity is large enough;
Electrode management: Does it support electrode management, the maximum number of electrodes that can be managed, and how many types of calibration data can be recorded for each electrode;
Communication interface: Does it have an RS-232 interface.
3. Accuracy and stability
Check if the nominal accuracy range of the instrument meets your measurement needs; Whether the analysis speed is fast enough, how anti-interference is it, and whether the test results are reproducible.
4. Waterproof and dustproof:
Dissolved oxygen meters with waterproof and dustproof functions are suitable for outdoor work. Generally speaking, dissolved oxygen meters with a protection level of IP65 can meet the needs of most outdoor work.
5. Instrument self-protection
Check if the instrument has a data power-off protection mode and if it has power management functions such as automatic shutdown.
6. Type selection
The choice of pen type, portable, desktop or industrial dissolved oxygen analyzer is mainly based on your usage scenario. Pen type dissolved oxygen meters generally have a single range, a small measurement range, but are relatively inexpensive. The portable dissolved oxygen analyzer has more functions than the pen type and is suitable for non fixed working environments; The desktop dissolved oxygen analyzer is the most commonly used type in laboratory environments. Industrial dissolved oxygen meters have good stability, reliable operation, and strong environmental adaptability, and are generally used in industrial production environments.
7. Selection of brand and quality
For the quality selection of dissolved oxygen meters, generally speaking, as long as the product is purchased from legitimate channels, produced by legitimate manufacturers, meets national standards, and has inspection and testing certificates, the quality is guaranteed. The specific quality comparison can be determined by the workmanship, the material of the raw materials, or by consulting feedback from experienced users of the product.
