1. Electromagnetic flowmeter:
Electromagnetic flowmeter is an instrument for measuring conductive liquid made according to Faraday's law of electromagnetic induction.
The electromagnetic flowmeter has a series of excellent characteristics, which can solve the problems that other flowmeters are not easy to apply, such as the measurement of dirty flow and corrosion flow.
2. Turbine flowmeter:
Turbine flowmeter is the main type of speed flowmeter. It uses a multi-blade rotor (turbine) to sense the average flow rate of the fluid and derive the flow or total amount from it. Generally, it is composed of two parts, a sensor and a display, and it can also be made into an integral type.
Turbine flowmeters, positive displacement flowmeters, and mass flowmeters are referred to as the three types of flowmeters with high repeatability and high accuracy, as one of the ten types of flowmeters.
3. Vortex flowmeter:
The vortex flowmeter is a meter in which a non-streamline vortex generator is placed in the fluid, and the fluid is alternately separated on both sides of the generator to release two series of regularly staggered vortices. Vortex flowmeters can be classified into stress type, strain type, capacitive type, thermal type, vibrating type, photoelectric type and ultrasonic type according to the frequency detection method.
4. Ultrasonic flowmeter:
Ultrasonic flowmeter is a meter that measures the flow rate by detecting the effect of fluid flow on the ultrasonic beam (or ultrasonic pulse). According to the principle of signal detection, ultrasonic flowmeters can be divided into propagation velocity difference method (direct time difference method, time difference method, phase difference method and frequency difference method), beam shift method, Doppler method, cross-correlation method, and spatial filtering method And noise law, etc.
Ultrasonic flowmeters are the same as electromagnetic flowmeters. Because there are no obstructions in the flow channel of the instrument, they are non-obstructive flowmeters. They are a type of flowmeter suitable for solving difficult flow measurement problems, especially in large-diameter flow measurement. The advantages.