High-fre­quency radar level tech­nol­ogy on the rise

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The in­tro­duc­tion of Ve­ga­puls 64 be­gins a new age in radar mea­sure­ment tech­nol­ogy for liq­uids

Ve­ga­puls 64, the world’s first radar level sen­sor for liq­uids, op­er­at­ing at a fre­quency of 80 GHz, has in­sti­gated a rad­i­cal new era in radar level mea­sure­ment tech­nol­ogy.

Eigh­teen months ago a new sen­sor for the con­tin­u­ous mea­sure­ment of bulk solids, Ve­ga­puls 69, was in­tro­duced with great suc­cess. This sen­sor also op­er­ates with a trans­mis­sion fre­quency three times higher than the widely used 26 GHz fre­quency. Th­ese in­stru­ments have proven their worth, es­pe­cially on me­dia with poor reflective prop­er­ties, in pro­duc­tion shafts up to 120 m deep, or in si­los with nu­mer­ous in­ter­nal in­stal­la­tions that gen­er­ate strong false echoes.

Ve­ga­puls 64 for liq­uid ap­pli­ca­tions will fol­low this leap. “Me­dia with poor reflective prop­er­ties, i.e. low di­elec­tric con­stant, can now be mea­sured sig­nif­i­cantly bet­ter than with pre­vi­ous radar sen­sors.” Thanks to the vastly bet­ter fo­cus­ing, the beam sim­ply passes by in­ter­nal tank in­stal­la­tions or build- up. In­ter­fer­ing signals, which pre­vi­ously had to be fil­tered out with false sig­nal sup­pres­sion, now play hardly any role in the mea­sure­ment process.

“More­over, it is now pos­si­ble to use a much smaller an­tenna. To­day we have process fit­tings with an an­tenna di­am­e­ter of only ¾” – equiv­a­lent to the size of a $2 coin.” The new tech­nol­ogy also al­lows pre­cise mea­sure­ment of the level very close to the tank bot­tom. This opens up new per­spec­tives in de­ter­min­ing the level in small con­tain­ers used in the phar­ma­ceu­ti­cal and biotech in­dus­tries, as well as de­ter­min­ing the amount of fuel left at the bot­tom of large fuel tanks. Mea­sure­ment ac­cu­racy is +/-2 mm, even with a work­ing range up to 30 m.

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