Measuring Tank
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For the calibration and functional testing of our underwater equipment, a dedicated measuring tank with dimensions of approximately 5 m × 5 m × 5 m is available. The tank is equipped with special absorbers on the side walls and the bottom to minimize reflections and interferences during acoustic measurements. REGUPOL playfix FX mats are used as damping material. These mats are made of rubber granulate and may influence the pH value and chlorine content of the water under certain conditions. To ensure consistent water quality and to protect the sensors in use, we maintain controlled water treatment. The pH value should ideally be in the range of 7.2 to 7.6 to enable effective yet material-friendly chlorination. The free chlorine concentration is maintained between 0.3 mg/L and 0.6 mg/L, while the total chlorine content should not exceed 1.0 mg/L. To adjust the pH value, we use standard pH-minus or pH-plus granules. If deviations occur due to the mats or other influences, fresh water is added to the tank as an additional measure to restore the water parameters to the desired range.
Responsabilities
| Who | What |
|---|---|
| Lukas Schirmer | Water measurements |
| Finn Röhrdanz | Pool cleaning |
Water Measurements - PH Value
Water Measurements - Free Chlorin Value
Water Measurements - Total Chlorin Value
Actions - Planned and Taken
| Date | Contents | Success or Failure |
|---|---|---|
| 21.10.2025 | Pool cleaning with robot | Done (Water quality really bad). |
| 24.09.2025 | Pool cleaning with robot | Done (Water quality really bad). |
| 08.08.2025 | Pool cleaning with robot | Done (No real cleaning effect). |
| 07.07.2025 | Pool cleaning with robot | Done (Finn 10.07.2025). |
| 16.06.2025 | Pool cleaning with robot | Done (Finn 17.06.2025)! Robot did not collect much/any dirt. Problems occured at screws, nevertheless beeing able to complete cleaning. |
| 01.06.2025 | Freshwater inlet via local hose for about 2 days | Water was much clearer compared to before |
We were happy to welcome Sören Lange as a new member of our team at the beginning of the year. In his master’s thesis, he focused on signal processing for innovative underwater opto-acoustic sensor systems and has since then taken on new challenges in the field of magnetic sensors. His research interests span a wide range of topics, including signal processing and control engineering. With his friendly attitude, technical curiosity and expertise, Sören is a great addition to our team. We look forward to working with him!