A measuring probe is provided for measuring and taking samples in a metal melt. The probe has a measuring head arranged on a lance, wherein the measuring head carries at least a temperature sensor and a sampling chamber, and wherein the sampling chamber is surrounded, at least partially, by the measuring head and includes an intake duct that extends through the measuring head. The intake duct includes an inner section, which extends in the measuring head and has a length L and a minimum diameter D at least at one site in the inner section. The ratio L/D2 is less than 0.6 mm−1.