In probe permeametry (mini-permeameter) measurement nitrogen gas is injected from the probe into core through a probe sealed to a core slab by a gasket.
Preparations for lithobraking involve protecting the probe with sufficient cushioning to withstand an impact with the surface and come to rest undamaged.
Because probes wear out, and because the auto-sensing circuitry is not compatible between different makes of oscilloscope, auto-sensing probe scaling is not foolproof.
Avalanche rescue equipment including radio transceiver, probe and shovel should be carried, and the ability to use them quickly and efficiently is required.
