This dataset contains turbidity (NTU) data acquired between June 2022 and July 2023 using a Wetlabs turbidimeter (ECO-BBRTD, serial # 215R) installed horizontally at 1.5 m height at the top of the SeaMoN East frame. The sensor was not calibrated as the sizes of the natural particles are unknown. Data was acquired every 15 minutes. The instrument is part of the SeaMoN East ecological monitoring node deployed at ca 10m away from the active hydrothermal edifice Tour Eiffel. Deployment 2022/06/23 – Nautile Dive 2040-13 (Momarsat 2022 cruise https://doi.org/10.17600/18001914) Recovery 2023/07/14 – Victor6000 Dive 839-01 (Momarsat 2023 cruise https://doi.org/10.17600/18002419)