When environmental contamination is very low, and the number of samples to be performed is high, operational duration can be an important factor in the choice of SAS instrument. Two sampling heads that operate simultaneously to sample 1000 litres of air, in less than three minutes, is the solution.
The simultaneous sampling on two heads also allows you to obtain statistically representative results when using the same type of media in both heads. It is also possible to use two different media for the same sampling cycle (TSA or PCA for Total Bacterial Count and SDA for yeasts and moulds). Sampling with the two heads can halve sample process time, which is a real advantage for busy users.