Ultrasonic flowmeters typically use one of two measurement techniques: Doppler or pulse transit time. The Systec Controls ultrasonic flowmeters we offer belong to the latter group. They measure the flow speed by analyzing the time difference of the ultrasonic waves. For this purpose, ultrasonic transducers are mounted outside the pipe, which work alternately as a transmitter and receiver, sending ultrasonic signals to each other. The ultrasonic flowmeter measures the difference in time of signals sent in the direction of flow and against the direction of flow, which is proportional to the flow speed. The principle of flow measurement using ultrasound means that ultrasonic flow meters, unlike electromagnetic flow meters, can be used to measure the flow of non-conductive liquids. Therefore, they are perfect for measuring the flow of distilled liquids, oils or fuels. Hence their wide application: in power plants, water and sewage management, building technology, chemical and petrochemical industries. Ultrasonic flowmeters are available in:
invasive (interference in the pipeline) and non-invasive (clamp-on type). In the non-invasive version, ultrasonic transducers do not come into contact with the medium. The installation of such flow meters is therefore not necessary
with the need to interfere with the pipeline. This makes clamp-on ultrasonic flowmeters a good solution for the food and pharmaceutical industries or for measuring aggressive media.
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