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.