If the ports are on opposite sides of the case, you can hold you hand in
front of one port and walk around your house. It will show up when you
block your walking speed from the static connection.

You could do a similar thing by connecting a piece of tubing to it and
bending it around so it points back as you walk. Again, the vario will
show up when the capacity port is open to your walking dynamic pressure.

This is probably safer than taking a battery, wires, and a suspicious
looking package to a tall building and trying to use the express elevator
to get to the top floor.

Steve Leonard