Using Radar Technology in Small Vessels

The key benefit of radar technology is that it can perform measurements in various and evolving process conditions across many types of media.

Due to its very small process fittings and encapsulated antenna system, VEGAPULS 64 can measure reliably, even in very small vessels.

Due to its very small process fittings and encapsulated antenna system, VEGAPULS 64 can measure reliably, even in very small vessels.

The use of the sensors in small vessels was very restricted in the past.

This is because sensors were not available with the small process fittings, which were required, along with not being able to attain the accuracy and measurement reliability needed at very close range.

Guided radar has been utilized as a promising alternative, but it quickly meets its limits in applications, which include agitators, strong product movements, or have thorough demands on hygiene.

While the close range of radar sensors is not restricted by a dead band, technologies previously used were often placed under limitations. This is because the interrupting signals from the antenna system could result in accuracy problems or could even shield the echoes from the surface of the product.

The Solution

The high frequency of VEGAPULS 64 not only allows for the utilization of much smaller process fittings, it also promotes significantly greater performance for measurements when the sensor is employed in small vessels.

The large sensor bandwidth generates very narrow echo signals, which causes a large increase in the accuracy of measurements even at close range.

The use of novel antenna technologies for the 80 GHz frequency range has helped to decrease the interfering signals at close range. This creates significantly more reliable measurements, right in front of the antenna.

These strong improvements in performance mean that the VEGAPULS 64 can also be employed in smaller vessels.

The Benefits

  • Contactless, wear-free, and hygienic measurement.
  • Simple replacement of previous technology due to the process fittings.
  • Accurate and universal radar technology can be employed in very small vessels.

Expert Tip

The reflected signal’s strength is calculated by the size and the medium of the antenna.

When taken directly in front of the antenna, level measurement is more difficult when the medium’s antenna is very small and when it reflects poorly.

When measuring oil products with a ¾ " antenna system, it is suggested to ensure a minimum distance of 10 to 15 cm, which can be attained with a stand-off nozzle. If larger process fittings are utilized, this distance can be much shorter.

Applications

Transport Containers for Liquids

Level Measurement of Liquids in Transport Containers

In several of the processes of production in the chemical industry, small amounts of different chemicals are required to enhance the features of particular products.

The media are frequently transported directly to the areas of production in small, transport containers. Precise level measurement guarantees a consistent supply of production materials.

Process Data

Measuring task

Level measurement

Measuring point

Tank

Measuring range up to

1 m

Medium

Liquids

Process temperature

-40 ... +50 °C

Process pressure

0 … 0 bar

Special challenges

Changing media, short measuring range

Reliable

Accurate measurement down to the bottom of the vessel

Cost-effective

The sensor is quick and easy to install

User-friendly

Visualized display of measurements

Batch Filler Vessel

Level Measurement in the Batch Filler Vessel

The small-batch filler vessels that are around 1 m high and 60 cm in diameter near the production facility provide the filler heads of the tank.

The products vary from chocolate spread to conserve to peanut butter, with different temperatures and viscosity.

The product density also varies in each batch. The level system is needed to maintain the optimum filling of jars.

Process Data

Measuring task

Level measurement

Measuring point

Vessel

Measuring range up to

1 m

Medium

Conserves and spreads

Process temperature

+10 ... +70 °C

Process pressure

0 … 0 bar

Special challenges

Changing product density, condensate, small vessel

Reliable

Measurement independent of density and viscosity

Cost-effective

Accurate level measurement optimizes the use of jars and medium

User-friendly

Simple setup

CIP System - Cleaning Agent Storage Tanks

Level Measurement and Point Level Detection in the Cleaning Agent Storage Tank of the CIP System

The cleaning of process equipment occurs within the framework of a verified ‘Clean in Place (CIP)’ procedure in the pharmaceutical industry to guarantee that hygienic conditions are upheld in tanks, pipelines, and production equipment.

Concentrated acids or sodium hydroxide are commonly utilized as cleaning agents, which are kept in storage tanks within the CIP system.

These are diluted in a premix vessel before being used. Level measurement allows for safe storage and effective usage of these cleaning agents. Point level detection acts as dry run protection and overfill.

Process Data

Measuring task

Level measurement and point level detection

Measuring point

Tank

Measuring range up to

3 m

Medium

Sodium hydroxide/acid

Process temperature

+5 ... +30 °C

Process pressure

0 … +1 bar

Special challenges

Chemically aggressive medium

Reliable

Approved materials in compliance with FDA and EC 1935/2004

Cost-effective

Maintenance-free operation

User-friendly

Simple mounting

Small Containers

This information has been sourced, reviewed and adapted from materials provided by VEGA Grieshaber KG.

For more information on this source, please visit VEGA Grieshaber KG.

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