Integrating a vacuum chamber with the Ashby Cross meter, mix system provides an excellent method to encapsulate or pot electronic circuits in a controlled atmosphere. Several steps are taken to ensure air-free potting compound.

1. Material is degassed to as low as 3 Torr in the reservoirs. Heat may be added at this step to ensure wet out and complete de-airing.
2. Air free material enters the metering cylinders at which point the ratio is established.
3. Proportioned material is then mixed and dispensed into the part within a controlled atmosphere (vacuum) in the chamber. The vacuum level in the chamber may be as low as 3 to 5 Torr and can be varied as needed.
4. Multiple passes can be done within the chamber at different vacuum levels to ensure complete wet out.
5. The chamber may be manual or automatic as needed.

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