Modern sensor technology at the historic Ettl Mill
The historic Ettl Mill in Grafenau, Lower Bavaria, boasts not only the carefully restored Zuppinger water wheel, but also a weir and fish ladder in the nearby Kleine Ohe. To keep a constant eye on the water level at these two critical points in the river, an efficient yet powerful IoT solution with sensor technology was to be installed.
The LoRa nodes and sensors were successfully installed at the weir and fish ladder and protected from harmful environmental influences. At both measuring points, the water levels are now logged relaibly and constantly. All data is stored in a database via a scalable API from our partner CONNCTD IT, then evaluated and imported into a clear, intuitive web interface. There, the water level data, which is updated every ten minutes, can be viewed and checked online at any time. If the water level exceeds the defined limit values, an automatic alarm is triggered. These critical values can be adjusted at any time as required. Moreover, average values are calculated on a weekly and monthly basis.
Anton Bogner is also more than satisfied with the new installation: "Reliable measurement without constant manual checks – this saves us an enormous amount of time. Thomas-Krenn had the right sensor technology in its range and adapted it perfectly to the conditions on site."
Automatic water level measurement with alarm system working in harmony with nature.
The water level at the fish ladder of the 700-year-old Ettl mill was previously measured manually.Together with two partners, Thomas-Krenn has now developed a measuring station that automatically measures the water level, transmits it in real time and sounds an alarm if the water level is too high. The system is built to withstand harsh environmental influences, can transmit data over great distances and blends in well with the surrounding habitat.
