Our ultrasonic flowmeter measures the flowrate from the difference between the propagation times of ultrasonic waves transmitted and received alternately between two transducers A and B. There are differences of operating principle in ultrasonic flowmeters. It is an easy-to-use flowmeter with high durability and repeatability and is widely adopted in various fields including calorie transactions and calorie control. It has no moving part and features low pressure loss. Vortex flowmeter is applicable to liquid, gas, and steam. This vortex is called Karman vortex, enabling you to know the flowrate from the frequency caused by. Vortex street occurs alternately and regularly in the right and left under a given condition downstream of an object (delta shape bluff body) placed in the flow. A major feature of the Coriolis flowmeter is a complex sensor that can measure temperature and density simultaneously with flowrate. In addition to general liquids, flowrate of foods, chemicals, slurry, high-density gas, etc.
Based on a unique principle utilizing Coriolis force, wide range of mass flowrate based system can be configured by detecting the mass flowrate in high accuracy and sensitivity and converting it to analog or frequency output. Especially, since their use was approved for taxable transactions of petroleum products by the National Tax Agency in Japan, positive displacement flowmeters have been assuming a significant role in the field of certified custody transfer.Ĭoriolis flowmeter is a mass flowmeter to directly and continuously measure the "mass", the only characteristic of fluid that is not affected by the change in temperature, pressure, viscosity, and density of it. Accordingly they are used in various kinds of applications including industrial instruments. Generally, positive displacement flowmeters offer high accuracy measurement and are suitable for totaling the flowrate. The flowrate is calculated from the number of revolutions of a rotor(s) activated by the energy of the fluid. In principle, positive displacement flowmeters requires no external energy such as electricity.
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