Patent ID: 7430930

Claim:
A sampler for taking a defined amount of sample of a fluid medium from a sample-taking site having: at least one sample storing receptacle; a tubular line, which is brought into contact with the fluid medium at the sample-taking site, for conducting the fluid medium into said at least one sample storing receptacle; a rotary piston pump, which moves the medium via said tubular line into said at least one sample storing receptacle; a sequence control, which activates the pump, such that it dispenses the defined amount of sample into said at least one sample storing receptacle, and a sensor, with which the amount of sample conveyed through said tubular line and dispensed into said at least one sample storing receptacle is determined, wherein: said sensor is one of: an angle sensor and a rotation sensor, which registers the angular rotation and/or the rotary movement of said rotary piston pump, and said sequence control controls said rotary piston pump on the basis of measured values delivered by said angle sensor or said rotation sensor such that the defined amount of sample is supplied through said tubular line into said at least one sample storing receptacle.