Abstract: A sampler system for sampling a volatile substance. The sample system comprises: a sample container. The sample container comprises an inlet for influx of a sample of the volatile substance into the sample container and an outlet for outflux of the sample substance from the sample container into a sample analyzer. A vacuum system is coupled to the sample container for providing a vacuum pressure in the sample container. A pressure system is connectable to the sampler container for conveying the sample substance to the sample analyzer and a selector switch is present for switching the sample container alternatingly between the inlet and the vacuum system or between the pressure system and the sample analyzer. According to the invention the sampler system is comprised with a dosing system for providing a predetermined adjustable dose level of sample substance in the sample container.