Bypass Level Indicators (VLI) for Visual Level Measurement

Bypass level indicators combine up to three functions in one compact device: level display, switches, and transmitters. The energy-free visual display operates inevitably according to the proven principle of communicating vessels and is safely readable over large distances.

WEKA Rod Magnet Principle for Maximum Reliability
Our VLI level indicator with horizontal rod magnet ensures clear and reliable control of the display rail, switches, and transmitters – even with the largest wall thicknesses of the float chamber. The patented magnetic guide band provides position-stabilized display flags and clear level indication even under difficult operating conditions such as rapid level changes or vibrations.

Wide Application Range
Operating pressures from vacuum to 500 bar, design pressures up to PN630, liquid densities from 0.3 g/cm³ and temperatures from -196°C to 400°C. Ideal for cryogenic liquid gases, water hydraulics, and steam boilers.

Material Diversity
From standard materials like 316/316L to special alloys (Inconel, Hastelloy, Titanium) and plastics (PVDF, PTFE). Explosion-proof designs according to ATEX/IECEx available.

Discover our bypass level indicator product lines: EconomyLine, SmartLine, StandardLine, HighPressureLine, PetroLine, LowDensityLine, and PlasticLine.

Visual magnetic bypass level indicator with side process connections

EconomyLine

Nominal pressure PN:≤ 6 bar
Temperature range:-40 … + 100°C
Fluid density: ≥ 0.60 g/cm3
Viscosity:≤ 600 cSt
 
Visual magnetic bypass level indicator with side process connections

SmartLine

Nominal pressure PN:

≤ 50 bar

Temperature range:

-40 … + 250°C

Fluid density:

≥ 0.60 g/cm3

Viscosity:

≤ 150 cSt

 
Visual magnetic bypass level indicator with side process connections

StandardLine

Nominal pressure PN:

≤ 50 bar

Temperature range:

-100 … + 400°C

Fluid density:

≥ 0.69 g/cm3

Viscosity:

≤ 600 cSt
 
Visual magnetic bypass level indicator with side process connections

HighPressureLine

Nominal pressure PN:

≤ 200 bar

Temperature range:

 -80 … + 400°C

Fluid density:

≥ 0.67 g/cm3

Viscosity:

≤ 600 cSt
 
Visual magnetic bypass level indicator with side process connections

PetroLine

Nominal pressure PN:

≤ 148 bar

Temperature range:

-80 … + 400°C

Fluid density:

≥ 0.47 g/cm3

Viscosity:

≤ 600 cSt
 
Visual magnetic bypass level indicator with side process connections

LowDensityLine

Nominal pressure PN:

≤ 50 bar

Temperature range:

-196 … + 400°C

Fluid density:

≥ 0.27 g/cm3

Viscosity:

≤ 600 cSt
 
Visual magnetic bypass level indicator with side process connections

PlasticLine

Nominal pressure PN:

≤ 10 bar

Temperature range:

-20 … + 140°C

Fluid density:

≥ 0.75 g/cm3

Viscosity:

≤ 600 cSt
 

Special VLI

Tailored Solutions for Complex Challenges

The extraordinary is our strength! When our extensive standard range is not sufficient, we develop custom level indicators for unique requirements with 50 years of experience.

Challenge WEKA with your extraordinary request – we develop your individual solution!

Locations

Locations

BOM Robinetterie Industrielle - Morocco

CASABLANCA, Morocco

  • Level Measurement

BOM Robinetterie Industrielle - France

VAULX EN VELIN, France

  • Level Measurement

BOM Robinetterie Industrielle - Algeria

VAULX EN VELIN, France

  • Level Measurement

BOM Robinetterie Industrielle - Tunisia

VAULX EN VELIN, France

  • Level Measurement

Inova Control S.A. de C.V.

Guadalajara, Mexico

  • Level Measurement

Shanghai Xiongfeng Automation Control Engineering Co., Ltd

Shanghai, China

  • Level Measurement

Contimetra Instrumentos Ind. Lda

Carnaxide, Portugal

  • Level Measurement

SWITECH

Gyeonggi-do, South Korea

  • Valves and Cryogenic Components

EPC

Wiener Neudorf, Austria

  • Level Measurement

Control Components Pty. Ltd

Miranda NSW, Australia

  • Level Measurement

Engtek Representative Office

Ho Chih Minh City, Vietnam

  • Level Measurement

Aran AG

Lausen, Switzerland

  • Valves and Cryogenic Components

Bachofen AG

Uster, Switzerland

  • Level Measurement

bestaxx GmbH

Frankfurt am Main, Germany

  • Level Measurement

DOEDIJNS FLUID INDUSTRY S.A. / N.V.

Puurs, Belgium

  • Level Measurement

Instrumix Folyamatműszerezési Kft.

Budapest, Hungary

  • Level Measurement

KLINGER Sweden AB

Järfälla, Sweden

  • Level Measurement

STIM

Bytom, Poland

  • Level Measurement

Thermo Electric Instrumentation B.V.

Waddinxveen, Netherlands

  • Level Measurement

WEKA AG

Bäretswil, Switzerland

  • Level Measurement
  • Valves and Cryogenic Components

Viking Instrument & Control Ltd

Burlington, Ontario, Canada

  • Level Measurement

Viking Instrument & Control Ltd

Burlington, Ontario, Canada

  • Level Measurement

Inland Industrial Instruments (M) SDN BHD

Shah Alam - Selangor, Malaysia

  • Level Measurement

Leif Kølner

Tonsberg, Norway

  • Level Measurement

Engtek Pte Ltd.

Singapore, Singapore

  • Level Measurement

RO INSTRUMART SRL

Bucharest, Romania

  • Level Measurement

Vantsa Co.

Varna, Bulgaria

  • Level Measurement

Fritz Barthel Armaturen GmbH & Co. KG

Hamburg - Altona, Germany

  • Level Measurement

ABLE

Berkshire, United Kingdom

  • Level Measurement

ACTS Inc.

Makati City, Philippines

  • Level Measurement

Yelma Trading Company - Saudi Arabia

Riyadh, Saudi Arabia

  • Level Measurement

Yelma Trading Company - Bahrain

Riyadh, Saudi Arabia

  • Level Measurement

Bin Moosa Trading & Contracting LLC

Muscat, Oman

  • Level Measurement

Daly Middle East LLC

Dubai, United Arab Emirates

  • Level Measurement

DME Trading and Maintenance WLL

Doha, Qatar

  • Level Measurement

ECONOSTO Oy

Kuopio, Finland

  • Level Measurement

OIH Instruments and Controls

Jet Park, South Africa

  • Level Measurement

Toshniwal Hyvac Pvt. Ltd.

Tamil Nadu, India

  • Level Measurement
  • Valves and Cryogenic Components

TAIYO NIPPON SANSO Co.

Kawasaki-city, Japan

  • Valves and Cryogenic Components

Samyang Arca Co. Ltd.

Bucheon - Incheon, South Korea

  • Level Measurement

Sistec

Parets del Vallès, Barcelona, Spain

  • Level Measurement

Smeri

Assago - Milano, Italy

  • Level Measurement

Summit Electronics Aps.

Hvidovre, Denmark

  • Level Measurement

PVN Engineering Co.Ltd.

Bangkok, Thailand

  • Level Measurement

DVMA GmbH - Estonia

Rastede, Germany

  • Level Measurement

DVMA GmbH - Lithuania

Rastede, Germany

  • Level Measurement

DVMA GmbH - Georgia

Rastede, Germany

  • Level Measurement

DVMA GmbH - Kazakhstan

Rastede, Germany

  • Level Measurement

DVMA GmbH - Latvia

Rastede, Germany

  • Level Measurement

DVMA GmbH - Belarus

Rastede, Germany

  • Level Measurement

DVMA GmbH - Uzbekistan

Rastede, Germany

  • Level Measurement

DVMA GmbH - Azerbaijan

Rastede, Germany

  • Level Measurement

DVMA GmbH - Ukraine

Rastede, Germany

  • Level Measurement

Shanghai Easytech Technology Co., Ltd

Shanghai, China

  • Valves and Cryogenic Components

Our expert is happy to help

Your personal contact

John M. Andrea

International Sales Manager, Senior Engineer Level Instruments

Send an email+41 43 833 43 27

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