Orifice flow transmitter XF

for liquidsanalog output

A thin elastic diaphragm made of stainless steel, which covers the entire flow cross-section, is deflected by the flowing fluid, and thereby pushes against an arched end stop. The shaped end stop and the elastic properties of the diaphragm mean that even severe water hammer causes no damage. The low number of media contact parts guarantees reliable operation and a low tendency to contamination. The connection pieces for both sides can be freely selected, and are flanged on. Various nominal widths and materials are available. By removing the four bolts of the flange connection, it is simple to emove the measurement unit for servicing, while the connections remain in the pipework. The integrated FLEX-XF converter / counter have an analog output (4..20 mA or 0..10 V) and a transistor output (push-pull). The transistor output can be used as a limit switch for monitoring of minimal or maximal, but also as a frequency output. There is a plastic-coated magnet on the diaphragm. When there is a deflection, its magnetic field changes, and this is detected by a sensor outside the area of flow. Because the diaphragm only bends, and functions without a bearing, there is almost no frictional effect. The movement therefore occurs practically free of hysteresis, and the test results have very good reproducibility. The diaphragm's low bulk results in a rapid response time. The almost complete covering of the flow cross-section in the neutral position allows very high initial sensitivity. As soon as the slightest flow exists, the diaphragm is of necessity deflected. The evaluation of the entire flow cross-section means that there are no problems when routing pipes.