The GCTS DSA-12 Differential Strain Curve Analysis Measurement Device is designed to test cubical rock specimens under hydrostatic conditions in order to determine the in-situ stress state. The results acquired from using the GCTS DSA-12 allow the user to characterize different parameters (porosity, distribution, orientation of cracks).

• Measurement device for Differential Strain Curve Analysis (DSCA).

• Includes twelve (12) high pressure LVDT sensors for strain measurement.

• Support base and LVDT holders with anodized high-quality aluminum construction.

• Stainless steel sliding rail for fast and precise positioning of sensors onto the samples with different dimensions.

• Interchangeable flat or pointed LVDT ends for suitable contact with the specimen.

• Accommodates cubical rock samples with maximum dimensions of 50 mm x 50 mm x 50 mm.

• Optional hydrostatic high pressure triaxial cell with pressure capacity of 140 MPa (20,000 psi).

• Requires signal conditioning and data acquisition unit for the sensors.

The GCTS Differential Strain Curve Analysis Measurement Device (DSA-12) is designed for testing cubical rock specimens under hydrostatic conditions in order to determine the in-situ stress state. The results obtained using the DSA-12 allow for characterization of the distribution of crack porosity with crack closure pressure as well as the crack orientation as a function of crack closure pressure amongst other parameters.

The DSA-12 comes with twelve high precision LVDT’s vented for pressures up to 140 MPa with cables to connect to electrical feed-throughs inside the triaxial cell.

GCTS offers the hydrostatic triaxial cell (HTRX-DSA) with a 140 MPa pressure capacity. HTRX-DSA features stainless steel construction with 16 feed-through lines, 4 clusters of 4 lines, for in-vessel instrumentation, 3 fluid pressure connectors (cell, drain and bleed ports), 100 mm (4 inch) inside diameter. HTRX-DSA accommodates DSA-12 device with the 12 LVDT’s and 50 mm x 50 mm x 50 mm cubical rock samples.

Please contact GCTS for full specifications.