What are the types of acidity meters - how are acidity meters classified
Generally, acidity meters can be classified according to application, instrument accuracy, reading indication, and component type:
1. Classification according to the accuracy of the instrument
It can be divided into 0.2 level, 0.1 level, 0.02 level, 0.01 level and 0.001 level, the smaller the number, the higher the accuracy.
2. Classify according to the reading indication
It can be divided into two types: pointer type and digital display type. Pointer pH meters are rarely used now, but pointer meters can display the continuous change process of data, so they are still used in titration analysis.
3. Classification according to component type
It can be divided into transistor type, integrated circuit type and single-chip microcomputer type. Now more microcomputer chips are used, which greatly reduces the size of the instrument and the cost of a single machine, but the development cost of the chip is very expensive.
4. Classification according to the application
It can be divided into pen type PH meter, portable PH meter, laboratory desktop PH meter and industrial PH meter, etc. The pen-type pH meter is mainly used to replace the function of pH test paper, and has the characteristics of low precision and convenient use. Portable pH meters are mainly used in on-site and field testing methods, requiring high precision and perfect functions. The laboratory pH meter is a desktop high-precision analytical instrument that requires high precision and full functions, some of which include printout, data processing, and so on. Industrial pH meters are used for continuous measurement of industrial processes. They not only have measurement display functions, but also have alarm and control functions, as well as installation, cleaning, anti-interference and other issues.
