【2025 Analysis Instruments】Analysis instruments are called “meters” or “instruments,” and there are principles behind this as well
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The attachment is: Analytical instruments are called “counters” and “meters,” and there are also principles behind this.
The following response is not part of the text in the attachment and is provided for reference only: Analytical instruments are a general term for devices used to measure the composition and content of substances (including mixtures and compounds), as well as certain physical properties. Those used in laboratories are called laboratory analytical instruments. Those used in industrial production processes are called process online automatic analysis instruments, also known as process analysis instruments.
Typically, automatic analysis instruments (also known as process analysis instruments or online analysis instruments) form an analysis and measurement system together with a sample preprocessing system, in order to ensure good environmental adaptability and high reliability, so that the readings provided by the analysis instruments can represent the components being analyzed.
Analysis method: Regular sampling, through laboratory analysis using laboratory-tested methods. Continuous measurement of the content or properties of the substance under test is carried out using automatic analysis instruments.
Selection of instruments: Instruments and meters are based on various measurement principles; therefore, when conducting analyses and measurements, it is necessary to choose the appropriate methods and instruments depending on the physical and chemical properties of the substance being measured.
Based on different measurement principles, they can be classified into the following categories: ① Electrochemical types (conductivity type, potential type, pH meters, ion concentration meters); ② Thermal types (thermal conductivity type, thermographic type, thermochemical type); ③ Magnetic types (nuclear magnetic resonance analyzers); ④ Radiation-based types (X-ray analyzers, microwave analyzers); ⑤ Optical types (infrared, ultraviolet absorption optical analyzers, light scattering, interference optical analyzers); ⑥ Electron-optical and ion-optical types (electron probes, ion probes); ⑦ Chromatographic types (gas chromatographs and liquid chromatographs); ⑧ Instruments for measuring physical properties (moisture meters, viscosity, density, humidity meters); ⑨ Others (crystal oscillation analyzers, semiconductor gas sensors). Only some of these types are capable of performing automatic analysis.
Auxiliary devices in online analytical instruments: sampling device, preprocessing device, constant temperature controller.
The functions of the sampling, preprocessing, and injection systems are to obtain representative samples from the process, adjust their composition to meet the requirements regarding the sample conditions for analysis, and then feed them into the analyzer.
The function of an analyzer is to convert the amount of components (or physical properties) in a sample being analyzed into measurable values.
Display and data processing systems are used to indicate and record data on analysis results, and to convert them into corresponding electrical signals that are sent to automatic control systems in order to automate the production process.
The power supply provides a stable and reliable power source for the entire instrument