Mini Packers

The MOD-2A system is used to measure the pore water pressure at the rock/concrete interface during construction or rehabilitation of underground structures.

Description

The MOD-2A system is used to measure the pore water pressure at the rock/concrete interface in tunnels, underground openings and basements.

The MOD-2A is suitable for short term monitoring of pressure during construction or rehabilitation of underground structures.

The MOD-2A system consists of a small mechanical (filter-end) packer, to be inserted in a 25 mm borehole, combined with an external vibrating wire pressure transducer (or manometer).

The main advantage with this type of instrumented packer is its ease of installation with simple hand tools; a standard concrete drill (borehole) and an adjustable open-end wrench for fixation. After monitoring is complete, the external pressure transducer can be removed at anytime and the MOD-2A system may be completely removed and reinstalled to other locations.

SPECIFICATIONS
Borehole size > 760 mm deep X 25 mm diameter
Packer Filter-end mechanical packer
Piezometer PWC (or optional manometer)
Piezometer Range 0.2, 0.5, 1 MPa  (other range available)
Cable IRC-41A
Tubing Stainless Steel