Fully Automated Permeability


The LoadTrac II/FlowTrac II flow pump provides a unique and versatile way to run flexible wall permeability tests on a wide variety of materials quickly and accurately. By adjusting the gradient or the flow rate across the sample, the system can measure permeabilities of cohesive soils varying from 10-4 cm/sec to 10-9 cm/sec. With the appropriate test cells, this one system can determine the permeability of some silty clays within minutes. The FlowTrac-II base unit includes a stepper motor, lead screw, pressure chamber and piston, pressure transducer, electronic controls and network communications. Versions of the unit are available with flow volumes of 250 cc and 750 cc. Flow rates can be set to any value between 0.000006 cc/sec. and 3.0 cc/sec. Flexible wall tests are run in a fully automated mode with three flow pumps and one LoadTrac-II; the FlowTrac-II's controls cell pressure and flow of cell, bottom sample and top sample. This configuration allows great versatility to run fully automated permeability tests with isotropic, anisotropic or Ko consolidation.With the network communications module and the appropriate software, the entire test can be automatically controlled, data captured and displayed in real time, and test reports prepared on a PC. With GeoNet-LAN option, the test can be monitored and data reported from any PC located on a LAN to which the LoadTrac II/FlowTrac-II system is connected.

Control and editing software runs in Windows® 2000, XP, Vista, 7 


Choose load capacity to fit user needs from 10, 22 45, and 90kN (2,000, 5,000,10,000, and 20,000 lbs.) models

Total automation, control, data collection and reporting of test results

Prepare tables and plots of report quality within minutes of completing a test

Geo-NET compatibility lets unit be accessed and controlled over a computer network

Generate columns of data for easy reduction using your own spreadsheet software

Choose volume capacity to fit user needs from 250, and 750 cc models

Accurate displacement rate control from 0.00003 to 15 mm per minute (0.000001 to 0.6 in. per minute)

Accurate pressure and volume measurements with integrated sensors

Stand alone through front keypad and LCD menu 


ASTM D-5084 - Flexible wall permeability

ASTM D-2434 - Rigid wall permeability 


MOTORStepper motor with built-in controls
TRAVELBuilt-in displacement transducer with 76 mm (3 in.) range and 0.0013 rnm (0.00005 in) resolution
DISPLACEMENTControl from 0.00003 to 15 mm per minute (0.000001 to 0.6 in. per minute)
FLOW RANGE0.000006 to 3 cc per second
POWER110/220 V, 50/60 Hz, lphase
LoadTrac II464 mm x 546 mm Х1206 mm (18 in. x 21.5 in. x 47.5 in.)
FlowTrac II203 mm x 406 mm x 470 mm (8 in. x l6in. x 18.5 in.)
LoadTrac II55 kg (120 lbs.)
FlowTrac II14 kg (30 lbs.)
FlowTrac II Models 
FTII-250-nn250 cc capacity
FTII-750-nn750 cc capacity
nnMaximum pressure range for system: 1400 and 3500 kPa (200 and 500 psi) available (resolution of pressure will be 0.00005 times the range)
LoadTrac II ModelsFrame capacity
LTII-10,00045 kN (10,000 lbs.)
LTII-20,00090 kN (20,000 lbs.)
LTII-50,000222 kN (50,000 lbs.)
ACCESSORIESTriaxial/Permeability cells up to 150mm (6.00 in.) diameter, membranes, porous stones and sample preparation accessories upon request.
Geo-NET PC network card and cable to link LoadTrac II/FlowTrac II to PC

 For viewing forms of the report and the interface of the operating program click the mouse on a corresponding miniature.