Utilities Middle East



Non-contact radars have now improved the reliabilit­y in pump control at the busiest part of Abu Dhabi city

several measuremen­t points involving flow, level, pressure and analysers. The level in these sewer networks provides informatio­n on the amounts of flow these networks are loaded with. Under ideal conditions, informatio­n about the levels give enough data to the operators to make decisions in planning pump and valve controls, and thus to avert an unconforma­ble situation like a flood. latest non-contact radar. Standard non-contact measuremen­t had a limitation here due to the internals within the tank.

Hydrostati­c sensors, like the name suggest, works on the water head pressure it experience­s. The measuremen­t is straightfo­rward and easy to understand: a head pressure of 1bar would relate to a water level of 10 meters.

Hydrostati­c sensors can just be dropped to the bottom of a well or in a protective tube to measure the water level. However, conditions in a waste water system are not ideal for such instrument. Sewage networks are filled with both household and sometimes with industrial wastes as well. The chemical compositio­n and the abrasive materials creates a challenge of the seals and diaphragm membrane, which slowly deteriorat­es creating a sensor failure.

Otherwise, the medium in sewage slowly turns to lumps that builds up chocking the pipes or the sensor and hence blocking the pressure from reaching the diaphragm. Being a contact

Ultrasonic transmitte­rs are the most common non-contact level transmitte­rs used till date and they continue to be used due to our close associatio­n to the technology for several years. They have earned their trust in several applicatio­ns in the water industry, but they have displayed reliabilit­y issues in certain conditions.

Due to the large dead zones, ultrasonic­s will not be a good choice for flooded conditions. According to the measuring range the dead zones can be as large as 450mm, where the sensors would fail once the water reaches this region below the sensor. Another limitation of ultrasonic would be condensati­on and fumes occurring in waste water networks, that would blind or attenuate the ultrasound. over any other non-contact measuremen­t technology due to the unique and highly improved advantage they presented.

VEGA Grieshaber KG, the German leader for level measuremen­t, is known for the radar level transmitte­rs that they manufactur­e. They have focused over the years in mastering the technology and has always been the technology leaders in this measuremen­t. The 80 GHz radar have proved it mettle, since it was launched in 2014.

It started off with the VEGAPULS69 measuring bulk solids through extreme dust and built up. Later with the VEGAPULS 64 launched in 2016, most difficult applicatio­ns in liquid level measuremen­t were easily handled. The instant success gave more reasons for VEGA to offer the same technology for low demand applicatio­ns like in the water industry at a much lower price.

In 2020, VEGA decided to launch the new noncontact radar by further pushing the design of its already successful 80 GHz radar to a more compact and performant design. The new generation­s of radars are powered by the 80 GHz technology downsized to a small chip, preserving its unique properties of narrow beam angles and great dynamic range.

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