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Malte Junge (BGR): MAPRs (Miniature Autonomous Plume Recorders) are used to locate active hydrothermal fields. They are equipped with four sensors (temperature, pressure, turbidity, pH) and can be attached to different tools and also to cables. MAPRs are battery-operated and have an internal memory. Back on board, the data of the sensors can be read out for further processing. Value approx. 800 €
Source: BGR