VSI - Model EV-101 -Vial Evacuator

In brief, the VSI EV-101 Vial Evacuator in its standard configuration uses 20 ml crimp-top glass vials as sample vials, sealed with 5 mm thick PTFE-lined grey butyl rubber stoppers and aluminium crimp caps. The Vial Conditioner can be loaded with up to 12x 20 ml glass vials and conditions the vials by rinsing and evacuating. After vacuum is applied, crimp-sealed vials can be purged with synthetic air, helium (or similar) for 1 min at 200 mL min-1 using two G26 side port needles. The number of flush - evacuation cycles can be adjusted. Finally, the rinsed vials are evacuated using a rotary vane pump through a single G26 side port needle to a final pressure of approximately 0.5 Pa. Our system has been laboratory tested to produce well evacuated vials with no contaminant gases after flushing. The EV-101 can be factory adapted to suit other vial sizes and types (e.g. 10 ml vials, other dimension etc.) as required.

The vial conditioner VSI EV-101 has e.g. recently been demonstrated to successfully prepare sample vials for whole air sampling in a UAV-based sampling campaign, using VSIs automatic UAV air sampling device. See Leitner, S., et al. (2023). "UAV-based sampling systems to analyse greenhouse gases and volatile organic compounds encompassing compound-specific stable isotope analysis." for details.