Method for detecting anomalies during the filling of a liquid metering device with a liquid to be measured out, said metering device comprising: - at least one suction member intended to be in contact with the liquid to be measured out and to contain same during the filling of the metering device, - at least one filling means arranged for filling, in an automated manner, the suction member, said filling means comprising at least one zone communicating with the suction member, said zone containing a gas, - and at least one pressure monitoring means arranged for measuring the pressure in the zone of the filling means or in a zone of the suction member containing a gas, the detection method comprising steps consisting of: - a) performing a prior pressure calibration of the filling of the metering device, this pressure calibration being carried out with at least two reference volumes so as to define a reference filling curve for each of the at least two reference volumes, - b) defining a desired volume of liquid to be measured out, - c) calculating for the desired volume a tolerance range having an upper limit and a lower limit, the upper and lower limits of the tolerance range being calculated on the basis of the reference filling curves, - d) filling the suction member with the liquid to be measured out for a time dt, - e) measuring the pressure using the pressure monitoring means, - f) checking whether the pressure is within the tolerance range and if the pressure is in the tolerance range returning to step d) until a filling time corresponding to the desired volume of liquid to be measured out is attained, - g) if the pressure is outside the tolerance range, reporting that an anomaly has been detected. - at least one suction member intended to be in contact with the liquid to be measured out and to contain same during the filling of the metering device, - at least one filling means arranged for filling, in an automated manner, the suction member, said filling means comprising at least one zone communicating with the suction member, said zone containing a gas, - and at least one pressure monitoring means arranged for measuring the pressure in the zone of the filling means or in a zone of the suction member containing a gas, the detection method comprising steps consisting of: - a) performing a prior pressure calibration of the filling of the metering device, this pressure calibration being carried out with at least two reference volumes so as to define a reference filling curve for each of the at least two reference volumes, - b) defining a desired volume of liquid to be measured out, - c) calculating for the desired volume a tolerance range having an upper limit and a lower limit, the upper and lower limits of the tolerance range being calculated on the basis of the reference filling curves, - d) filling the suction member with the liquid to be measured out for a time dt, - e) measuring the pressure using the pressure monitoring means, - f) checking whether the pressure is within the tolerance range and if the pressure is in the tolerance range returning to step d) until a filling time corresponding to the desired volume of liquid to be measured out is attained, - g) if the pressure is outside the tolerance range, reporting that an anomaly has been detected. - a) performing a prior pressure calibration of the filling of the metering device, this pressure calibration being carried out with at least two reference volumes so as to define a reference filling curve for each of the at least two reference volumes, - b) defining a desired volume of liquid to be measured out, - c) calculating for the desired volume a tolerance range having an upper limit and a lower limit, the upper and lower limits of the tolerance range being calculated on the basis of the reference filling curves, - d) filling the suction member with the liquid to be measured out for a time dt, - e) measuring the pressure using the pressure monitoring means, - f) checking whether the pressure is within the tolerance range and if the pressure is in the tolerance range returning to step d) until a filling time corresponding to the desired volume of liquid to be measured out is attained, - g) if the pressure is outside the tolerance range, reporting that an anomaly has been detected.