Detailed classification of pH meters

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Classification: Based on the needs of production and daily life, people have scientifically developed many different models of pH meters. According to measurement accuracy, they can be classified as having a precision of 0.2 grade, 0.1 grade, 0.01 grade, or even higher. Based on their size, they can be classified into pen-type (miniature), portable, desktop, and online types for continuous online monitoring and measurement. Depending on the usage requirements, pen-type (miniature) and portable pH meters are generally taken to the site by testers for on-site measurements. The accuracy level of a pH meter is determined based on the precision required for the user’s measurements, while the various shapes of pH meters are chosen to facilitate ease of use for the user. ◆Classified by portability, they are divided into: portable pH meters, desktop pH meters, and pen-type pH meters. ◆Based on their applications, they can be classified into: laboratory pH meters, industrial online pH meters, etc. ◆Based on their level of sophistication, they can be classified as economical pH meters, intelligent pH meters, or precision pH meters; or they can be divided into analog pH meters and digital pH meters. ◆Pen-type pH meters are generally designed with a single measurement range, offering a narrow scope of measurement; they are simple instruments. Portable and desktop pH meters have a wide measurement range and are commonly used instruments; the difference is that portable models are powered by direct current and can be taken to the field. Laboratory pH meters feature a wide measurement range, multiple functions, and high measurement accuracy. Industrial pH meters are characterized by the need for good stability and reliable operation, a certain level of measurement accuracy, strong adaptability to different environments, and high resistance to interference. They also feature analog output, digital communication, upper and lower limit alarms, as well as control functions.