Matters needing attention when purchasing a pH meter/acidity meter

Things to pay attention to when purchasing a pH meter/acidity meter: 1. Consider the application site, choose a pen-type pH meter, a portable pH meter, a desktop pH meter or an industrial pH meter; According to the accuracy classification of the ph meter, it can be divided into 02, 01, 005, and 001. The smaller the number, the higher the accuracy. The pen-type pH meter is mainly used to replace the function of pH test paper, which has the characteristics of low precision and convenient use. Portable pH meters are mainly used for on-site and field measurement systems, requiring high accuracy and excellent performance. The laboratory pH meter is a desktop high-precision instrument that requires high precision and full functions, including 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 4-20MA output, automatic cleaning, anti-interference, connection to computers, connection to recorders, etc. Goal considerations. 4. A, classified according to the type of components: it can be divided into transistor type, integrated circuit type and single-chip microcomputer type, and now more microcomputer chips are used. B. Classification according to the reading instructions: it can be divided into two types: pointer type and digital display type. Pointer pH meters are now rarely used. 5. Matters needing attention Check whether the pH meter has some functions. For example, some pH meters are equipped with RS232 interface as standard. Another important thing is whether the temperature compensation is automatic or manual.
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