VEGA Level transmitter.pdfVIP

AL-EN - 27 Level measurement – Guided microwave Overview _____________________________________ 28 VEGAFLEX Serie 60 ___________________________ 30 Dimensions ___________________________________ 42 28 - AL-EN Level measurement – Guided microwave Level measurement – Guided microwave Measuring principle High frequency microwave pulses are coupled on a cable or rod and guided along the probe. The pulses are reflected by the product surface and received by the processing electronics. A microcomputer identifies these level echoes which are measured, evaluated and converted into level information by using the ECHOFOX software. Thanks to this measuring principle, the adjustment with medium is no longer necessary. The sensors are preset to the ordered probe length. The cable and rod versions (can be shortened) can be adapted in an ideal way to the individual conditions on site. Insensitive to dust, steam and product fluctuations Even process conditions such as high dust and noise generation or very steamy atmospheres do not influence the measurement accuracy. Density fluctuations, different granulation sizes or even fluidization do not influence the accuracy. Even changes from dry to wet gravel are no problem. Strong buildup on the probe or vessel wall does not influence the measurement result. Apart from the continuous level measurement of solids and liquids, the guided microwave measuring principle was further developed for interface measurement. Typical applications are measurement of oil and water or solvents and water. The microwave pulse is guided along a rod or rope and is reflected by an interface with different dielectric value. This enables to measure several layers. The advantages compared to displacers and floats is that the measuring principle is independent of density and does not use any moving parts. Maintenance-free operation is therefore guaranteed. VEGAFLEX: Universal sensors for solids and liquids Interface measurement in liquids Level measurement – Gu