Legionella rapid test
Measuring and combating legionella in cooling towers
Water hygiene in industrial processes: Online legionella control with INWATROL L.nella+ within just 5 hours
Water plays a crucial role in various industrial processes, including those in metal and food industries. It is used for cooling, cleaning and in production processes. However, the susceptibility of water to microorganisms and bacteria such as Legionella poses a particular challenge. These bacteria can pose serious health risks, especially in water-bearing systems. Therefore, the 42nd BImSchV (Federal Immission Control Ordinance) requires the hygienic operation of evaporative cooling systems, cooling towers and wet separators in order to prevent the spread of Legionella and ensure the health of employees, the environment and the quality of products. We can help you effectively combat Legionella in the water of cooling towers.

INWATROL L.nella+: Fully automated Legionella measurement
To ensure continuous and reliable monitoring of the Legionella concentration in your systems, we have developed the INWATROL L.nella+. This innovative and patented measuring device offers fully automated determination of the Legionella concentration in your cooling systems. The INWATROL L.nella+ automatically analyzes water samples and delivers precise results in just 5 hours.
The measured values can be called up online at any time via our user-friendly “INWAnet” interface, where they are displayed in CFU/100 ml. If the legally prescribed limit value is exceeded, you will immediately receive an alarm notification so that you can take immediate action. When and connected to an IBC, the device can dose biocide as needed to reduce the Legionella load immediatley.
More about our patented system
Advantages of the INWATROL L.nella+ for operators
The device reacts to elevated measured values and automatically doses biocide as needed to reduce the concentatrion of Legionella.
The INWATROL L.nella+ enables continuous monitoring of the Legionella load in near real time and automatically documents the hygiene status. This data is available online 24/7 and offers comprehensive alarm management.
Measurements from the INWATROL L.nella+ demonstrate a high correlation with accredited procedures according to DIN EN ISO 11731:2019-03, ensuring reliable and accurate monitoring.
Due to its low cost per analysis, the INWATROL L.nella+ is an economical solution for continuous Legionella monitoring.
In addition to measuring Legionella, the device continuously monitors other important parameters such as chlorine, redox potential, conductivity, and pH to ensure holistic water quality assurance.
Instead of days of laboratory analysis, the INWATROL L.Nella+ provides meaningful results after just 5 hours. This allows the prevention of Legionella proliferation at an early stage.
Additional Benefits and Features
- Easy Integration: The INWATROL L.nella+ seamlessly integrates into existing water systems and requires minimal maintenance.
- Ease of Use: Its intuitive user interface and simple handling make using the device straightforward and efficient.
- Durability: The robust design and high-quality components ensure a long service life of the device, resulting in a sustainable investment in your water hygiene.

Explanatory video
In this video, we humorously explain how our patented system works. Watch now to see how Inwanella’s cocktail party in the cooling tower comes to an end.
Contact and further information
If you are interested in our INWATROL L.nella+, please submit an inquiry using our contact form. Our responsible department will contact you promptly to provide further information and personalized advice.
Learn more about the INWATROL L.nella+ and how it can revolutionize your water hygiene in our blog post. (Link) Here you will find detailed information and application examples that show you how to effectively control Legionella contamination in your systems.

