improved molten metal sampler sampler for taking a molten metal bath with a carrier tube with immersion end and sample chamber assembly at the immersion end, the sample chamber assembly having a cover plate and a housing, the which has an immersion end with a first opening, for an inflow duct, and an opposite end with a second opening, for a gas coupler; and a first face, between the immersion and the opposite ends, having a first depression, close to the immersion end, and a second depression, the first being an analysis zone and the second being a ventilation zone, a part of the zone of ventilation overlapping that of distribution, which is in direct fluid communication with the first opening and which receives the molten steel from the inflow duct, in which the first depression has a circular segment profile of cross section, on a central longitudinal axis, concave or triangular; the cover plate and the housing assembled together forming a sample cavity having distribution, analysis and ventilation zones, so that an analysis surface of a solidified steel sample from the sample cavity is in the foreground; and the first and second openings are spaced from the foreground. a second embodiment has a cover plate and a housing, which has a gas-tight, non-contaminating sealing member between the cover plate and the housing.
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