What are the advantages of the external clamp ultrasonic flowmeter?

What are the advantages of the external clamp ultrasonic flowmeter?
1. Main differences between fixed ultrasonic flowmeter and portable ultrasonic flowmeter
(1) Applicable to different occasions, fixed ultrasonic flowmeter is used to measure the flow of fluid in a specific pipeline continuously for a long time when installed at a fixed position; Portable ultrasonic flowmeter has great mobility and is mainly used for temporary measurement of fluid flow in different pipelines.
(2) Different power supply modes require long-term continuous operation of fixed ultrasonic flow meters, so 220V AC power supply should be used. Portable ultrasonic flow meters can use both on-site AC power supply and built-in rechargeable batteries, which can work continuously for 5 to 10 hours, greatly facilitating the need for temporary flow measurement in different fields.
(3) Some functions are different from fixed ultrasonic flowmeter, which usually has 4-20mA signal output and other functions for remote display, but it can only store the parameters of one pipeline; The portable ultrasonic flowmeter is only used to check the current flow and the accumulated flow in a short time, so it generally has no output signal function. However, in order to measure the flow of different pipes conveniently, it has rich storage functions, which can store the parameters of different pipes at the same time for calling out at any time.
2. The power supply mode of fixed ultrasonic flowmeter and portable ultrasonic flowmeter transducer is different It can be divided into three types of ultrasonic flowmeter: external clamp type, plug-in type and pipe section type.
(1) The externally attached and externally clamped ultrasonic flowmeter is a kind of ultrasonic flowmeter that is produced earlier, familiar to users and widely used. The installation of the transducer does not need to cut off the flow of the pipeline, and it can be used immediately. It fully reflects the characteristics of simple installation and convenient use of the ultrasonic flowmeter.
(2) Some pipes of pipe section type have serious attenuation of ultrasonic signal due to sparse materials, poor sound conduction, or serious corrosion, and gaps between the lining and the inner space of the pipe. The external attached ultrasonic flowmeter can not measure normally, so the pipe section type ultrasonic flowmeter is produced. The tubular ultrasonic flowmeter integrates the transducer and the measuring tube, which solves a difficult problem in the measurement of the externally attached flowmeter. In addition, the measurement accuracy is higher than other ultrasonic flow meters, but at the same time, it also sacrifices the advantages of continuous flow installation of the externally attached ultrasonic flow meters, requiring the installation of transducers by cutting the pipe.
(3) The plug-in ultrasonic flowmeter is between the two. The installation can be completed without cutting off the flow, using special tools to drill holes in the pipeline with water, and inserting the transducer into the pipeline. Since the transducer is in the pipeline, its signal transmission and reception only pass through the measured medium, not through the pipe wall and lining, so its measurement is not limited by the pipe quality and pipe lining material.


Post time: 15-02-23