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Instrumentation is used to detect, measure, observe, calculate various physical quantities, material composition, physical parameters and other appliances or equipment, in the industrial, scientific research, medical, environmental protection and many other fields play a key role. The following is a detailed introduction to instrumentation: I. Classification of instrumentation There are many types of instrumentation, which can be divided into various types according to different classification standards. Common classification methods include: Classification by function: Testing instrumentation: Used to detect various physical quantities, chemical quantities, etc., such as temperature measuring instruments, pressure measuring instruments, flow measuring instruments, etc. Regulation instrumentation: Used to automatically adjust the production process, such as pneumatic regulating instruments, electric regulating instruments, etc. Display instrument: Used to display measurement or control results, such as digital display instrument, analog display instrument, etc. Actuator: Performs corresponding actions according to control signals, such as electric actuators, pneumatic actuat...