Turbine flowmeters use the principle of fluid flow through the rotation of turbine blades to measure flow. The output signal types are diverse, including frequency, analog and digital signals.
Turbine flowmeter is a commonly used flow measurement device that can measure the flow of various liquids and gases. The principle is that when the fluid flows through the turbine blades, the blades are driven to rotate. According to the relationship between the rotation angular velocity and the fluid flow rate, the fluid flow rate can be calculated by detecting the rotation speed of the rotor. Different types of turbine flowmeters output different signal types and characteristics. The following is a detailed introduction to different types of turbine flowmeters.
1. Frequency output signal
The most common signal output of a turbine flow meter is a frequency signal, and the output frequency is proportional to the fluid volume flow. Normally, the frequency signal output is a square wave signal, and the frequency is linearly related to the flow rate of the fluid. Therefore, frequency signals are often used for device control and data recording.
2. Analog output signal
The turbine flowmeter can also output an analog signal, usually a current signal or a voltage signal, and the output size is linearly related to the flow rate of the fluid. The analog signal output can be connected directly to other devices, such as controllers, computers or data acquisition systems. The range of the analog signal output is usually 4 mA to 20 mA (current signal) or 0 V to 10 V (voltage signal), so changes in flow can be monitored and controlled through the analog signal output.
3. Digital output signal
Turbine flowmeter can also output digital signals. This signal type usually uses a fieldbus protocol (such as Modbus RTU) to output flow values. The digital signal output can be decoded to obtain the flow value, so it is more reliable and can be used for remote monitoring and control in industrial control systems.
In short, turbine flowmeters have various output signal types, and different signal types can be selected according to the specific application requirements of the equipment. By understanding the different output signal types of turbine flow meters, users can more flexibly implement flow monitoring and control in their applications.
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