The industrial automation instrument, also known as a flow meter, used by Suzhou Ruisman Machinery Co., Ltd. in the Instrument and Meter Business Unit to measure the flow rate of liquids, gases, or vapors in pipelines or open channels. Flow rate refers to the amount of fluid flowing through the effective cross-section of a pipeline per unit time. The quantity of fluid expressed in volume is called volumetric flow rate, in units of meters per hour, liters per hour, etc; The quantity of fluid expressed in terms of mass is called mass flow rate, with units such as tons/hour, kilograms/hour, etc.

Automation instruments are automation technology tools that are composed of several automation components and have relatively complete functions. It generally has several functions at the same time, such as measurement, display, recording or measurement, control, alarm, etc. The automation instrument itself is a system and also a subsystem of the entire automation system. Automation instruments are a type of "information machine" whose main function is to convert information forms, converting input signals into output signals. Signals can be expressed in time or frequency domains, and their transmission can be modulated into continuous analog or intermittent digital forms.

Automated instruments are instruments or equipment used to detect, measure, observe, and calculate various physical quantities, material components, physical parameters, etc. Vacuum leak detectors, pressure gauges, length gauges, microscopes, multipliers, etc. are all instruments and meters. In a broad sense, instruments and meters can also have functions such as automatic control, alarm, signal transmission, and data processing. For example, pneumatic regulating instruments used in industrial production process automatic control, electric regulating instruments, and distributed instrument control systems are also instruments and meters. Instruments and meters can improve, expand, or supplement human functions. People use their sensory organs to see, listen, taste, and touch external things, while instruments such as microscopes, telescopes, sound level meters, acidometers, and pyrometers can improve and expand these senses; In addition, some instruments such as magnetometers and ray counters can sense and measure physical quantities that cannot be felt by human sensory organs; Some instruments and meters, such as high-speed cameras and computers, can surpass human capabilities in recording, calculating, and counting.

Automatic detection instruments are one of the key subsystems in automatic control systems. General automated testing instruments mainly consist of three parts: ① sensors, which use various signals to detect analog quantities being measured; ② The transmitter converts the analog signal measured by the sensor into a 4-20mA current signal and sends it to a programmable controller; ③ Display the measurement results visually and provide the results.

Automated testing instruments are widely used in industrial production due to their characteristics of accurate measurement, clear display, and simple operation. Moreover, they have interfaces with microcomputers and are an important part of the automation control system, known as the eyes of the automation control system. Automation instruments mainly include temperature instruments, pressure instruments, level instruments, flow instruments, and some process analysis instruments.