Product Feature 
   Series 7200 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(110V/220V), built-in vatter or DC power.
•  Using the most advanced direct-time-measuring method, the unit offers a signal resolution of 0.2ns.
    In addition, advanced data processing functions ensures 7200 of hight linearity.
•  Signal outputs including current signal, frequency signal and RS-232 serial data ;
    switch output includes one OCT and one relay output ;
    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 filthy water
•  Food, Medicine, paper-made
•  Automobile making and check-up Semi-conductor (Pure water)
•  Oil field, petroleum chemical engineer system
•  Power plant(heat power, water power, fire power)
•  Heat net balance of heat supply system
•  Steel factory, mining industry
   
 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;