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.

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 27German, English, French
