evacuate vials for air and soil pore water sampling

VSI EV-101 Vial Evacuator. The device will evacuate vials by pulling a vacuum, fill with helium, and pull a vacuum again. Vial septa are once punctured with needles to do so. The revolver holds 11 vials for convenient evacuation of batches. 

The evacuated vials / vacuum tubes can be used with the

1) the Automatic Air Sampler AS-100, abd

2) to sample soil pore water with RRP (Micro-)Rhizons.