COVER STORY ADVERTISEMENT FEATURE
chemicals for waste water treatment processes. The new radar sensors can exploit their strengths here, as they can be installed in very confined spaces and small process fittings. Or they can look through plastic tanks and safely measure the chemicals inside. Even if the medium generates gases, the sensors remain unaffected and deliver reliable measuring results. In addition, they have an Ex approval for flammable media. So it makes them highly versatile for use in a wide range of applications.
Reliable level values independent of process and environmental influences Due to their physical measuring principle, ultrasonic sensors are easily affected by ambient conditions: for example, the transit time of sound changes with temperature, like warming by the sun or varying vapour and gas composition, these can all affect measurement accuracy. Strong winds, rain, or even fog, can damp the emitted sound waves and restrict their measuring range. Radar sensors, however, are not affected by these conditions - or even pressure, vapours, gases or vacuums - they continue with accurate readings. Open channel flow measurement needs the highest possible accuracy and
stability due to the root calculation of the flow formula. In outdoor applications, whether in rain or intense sunlight, the new radar sensors perform accurately without any temperature effects. One example is flow rate measurement in the main inlets of the sewage treatment plant. The focused, high performance of the new radar sensors, enables precise measurement and therefore a reliable calculation of wastewater flows.
Low power for remote sites and telemetry Because of these immunities, the new compact radar sensor is ideal for monitoring of river and flood levels. Its measured values are crucial for being able to react quickly and correctly in the
event of flooding. Radar sensors can monitor river levels without being affected by temperature stratification/
fluctuations, high winds, rain or heavy mist. Even at
a distance of 30 meters from the water surface, a radar transmitter delivers level
readings with millimetre resolution.
They also offer SDI12 and Modbus outputs, and all devices have a sub 10 second start up cycle, making them highly suitable for use with battery powered telemetry outstations and loggers.
Bulk solids level monitoring too Another example is lime silo level
THE BENEFITS OF RADAR SENSORS
Process and environmental influences Radar sensor performance is not affected by weather, solar gain, temperature, pressure or vacuum and delivers correct, reliable readings under all environmental conditions.
Dirt and condensation Radar sensors are immune to the effects of heavy condensation, dirt and build-up on the sensor face and do not require cleaning, which means better data and fewer call outs.
Dead zone and submersion Radar sensors enable reliable measurement right up to the sensor antenna itself, and maintain reliable performance even when flooded, increasing vessel capacities and ensuring predictable operation during overfill.
Reliability and accuracy Radar sensors are inherently accurate as they use microwaves to measure distance. Their highly focused, narrow 80GHz frequency radar beam is perfect for use in confined spaces like wet wells, sumps or vessels with many internal installations – this means smoother, reliable level measurement without the ‘jumps’.
measurement, which is used to stabilize the effluent pH value, and is an ideal application for the new VEGAPULS instrument series. Bulk solids can be measured reliably with no effect from the dust generated during the filling process. Thanks to strong signal focusing, build-up and deposits on the container wall or on the sensor face itself are no problem.
Optional controllers and Bluetooth built-in The radars, although compact loop- powered, can also have an optional controller for local display, extra outputs and level alarms. Both sensors and controllers can be easily and safely adjusted via Bluetooth with a smartphone or tablet – ideal for harsh environments, operational safety or Ex areas.
https://www.vega.com/en/home_uk/pro ducts/product- catalog/level/radar/vegapuls
/ PROCESS&CONTROL PROCESS & CONTROL | DECEMBER 2019/JANUARY 2020 13
Compact 80GHz radar with connection housing and optional field mounted display (right)
Sealed cable IP68 compact sensors with Bluetooth (left)
Latest generation field- mounted controllers with Bluetooth, SD card data logging - for single, twin, differential, pump and open channel flow measurement (below)
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52
