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ETL Verfahrenstechnik GmbH- sample filtration for all applications

As a specialist for sample preparation, ETL Verfahrenstechnik GmbH has been supplying reliable filtration systems for industrial and municipal sewage treatment plants for over 30 years. Based on many years of experience we offer our customers filtration solutions for a wide range of applications.

Modern on-line analyzers are - for the exact determination of ingredients - dependent on obtaining a clear, solid-free sample for the measurement. Filtration systems from ETL provide such a sample using the latest filter technology, so that your system can be controlled based on the measurement parameters and thus operated economically. You are completely independent of the make of the on-line measuring device, because all our systems and even individual modules can be coupled with any on-line analytical measuring technology. The systems basically automate well-known sampling methods.

Our company produces waste water filters in various sizes and designs. The program ranges from plate filters to filter probes and membrane filters.

We will be happy to advise you personally. Please call us: +49 8861 930907-0

ETL Verfahrenstechnik GmbH - competence in filtration technology

ETL GmbH offers its customers not only a reliable and high-quality product, but also short delivery times and an excellent price-performance ratio. In addition, our experienced experts are always available to answer your questions with competent advice.


The monitoring of the contents of waste water is the responsibility of the sewage plant operators. In order to ensure that only limit-conforming concentration quantities are returned to nature, the water is regularly sampled, analyzed and, if necessary, measures are taken. This serves to protect the water and the health of all of us. With our systems, we support those responsible by providing samples of the required quality for monitoring limit values. In this way, our sample preparation equipment in combination with the analyzers ensure the exact determination of wastewater parameters. We are completely free with regard to the measuring method of the measuring device, as we can react to the respective requirements both with the selection of the system and with different filter finenesses.

ETL Verfahrenstechnik GmbH - optimal filtration results

In filtration, a fundamental distinction is made between the separation areas of micro-, ultra- and nanofiltration. For the purpose of sample supply of measuring instruments the range of microfiltration and coarser is sufficient. Here we are moving at a particle size of 0.1 to 10 µm. We work either with the cross-flow method or in dead-end operation. Due to the cross-flow mode of operation, in which the membrane is flowed around, a cover layer gradually forms around the filter surface. This can be removed, for example, by backflushing through an air-water mixture at certain time intervals.


The membranes we use are made of a wide variety of materials. While the TMS-C uses a pore membrane, the CMS uses a special metal mesh. Furthermore, the filtration of the PMC is carried out with the help of a ceramic-like membrane. This enables us to provide our customers with the right tool for every application.

ETL Verfahrenstechnik GmbH is your proven specialist company for filter technology. We solve challenging filtration problems and are happy to advise you on the purchase of a new filtration plant or on a planned retrofit of your existing plant.