Instruments are installed at dedicated emplacement levels by creating cut-outs in the compacted material. Each instrument (e.g. TDRs, pressure sensors, seismic sensors) requires specialised methods to embed within the compacted material.

Gast expereiment, Grimsel : Instrumentation
Emplacement of 3-finger TDR

Gast expereiment, Grimsel : Instrumentation
Levelling of instruments

Gast expereiment, Grimsel : Instrumentation
Emplacement of pressure port

Gast expereiment, Grimsel : Instrumentation
Drilling for emplacement of seismic sensors

Gas-Permeable Seal Test (GAST)