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Product Feature
Series 7240 is
single board, self-contained and state of the art ultrasonic flow meter. It
has the notable characteristics of high precision, high reliability, high
performance, low price etc..
Main features are
Advanced intelligent display, computation and printing to suit
user's diversified requirements. The
flow is displayed in all pertinent engineering units. It runs out of regular power (80~240V).
Using the most advanced direct-time-measuring method, the unit
offers a signal resolution of 0.2ns. In
addition, advanced data processing functions ensures 7240 of hight linearity.
Signal outputs including RS-232 serial data ; And all the outputs
displayed on the unit can be configured to be transmitted to a PC via RS-232C.
Product Application
Water supply, draining off and
the processor of
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Food, Medicine, paper-made
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filthy water
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Automobile making and check-up
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Oil field, petroleum chemical
engineer system
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Semi-conductor
(Pure water)
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Power plant(heat power, water
power, fire power)
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Heat net balance of heat supply system
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Steel factory, mining industry
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Product Description
When an
ultrasonic wave travels in a liquid, the flow of the liquid will cause its speed
to change. When it travels in the flow direction, its speed increases and
against it, it decreases. By measuring the difference in travel times
between both directions, one can measure the flow speed. As shown in Chart
1, a pair of sensors are mounted upstream and downstream on the surface of the
pipe. Its mounting configuration can be 'Z' or 'V'. The time difference of
ultrasonic signals transmitted and received across upstream and downstream
are calculated as below;
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