site map

Product Information

Geotest Home

Customer Service


Geotest Catalog
Request Catalog



Contact Geotest


S2213A. Direct Shear, dial

Direct Shear

Geotest direct shear machines combine accuracy and reliability of dead load with the flexibility of pneumatic normal loading. This is accomplished by using a small built-in load cell to measure the actual normal stress being applied to a specimen.

Normal load is regulated by a precision regulator. Normal load can be applied through a range of 2 to 2,250 lbf (10N to 10kN) due to a second mini-cylinder mounted on the upper cross arm.

** All pneumatically loaded machines except Geotest measure applied pneumatic load. Only Geotest measures actual load. Although applied load remains constant due to a precision regulator, the actual load often changes during shearing. To maintain a constant actual normal load the following accessory is offered.

S2215A.30 Normal Load Electronic Feed Back Control

This control will maintain normal load at set value until specimen fails in shear. It can be specified at time of purchase or added to existing machine.

Geotest offers 3 different direct shear machines with the following distinguishing features.

  • Display of normal and shear stress to 0.1 lbf or 1N*
  • Use of load cell to measure actual normal load*
  • Normal load from 2 lbf (10N)* (except S2213A )
  • Upper half of box exerts no load*
  • Capacities for normal load and shear 2,000 lbf (10kN)
  • Pneumatic application of consolidation stress
  • Automatic residual shear feature
  • Load cell to measure shear and residual shear
  • Speed range 0.00003 to 0.15 inch (0.0007 to 3.8mm) /min.
  • Speed steplessly controlled to within 1%
  • Rapid return feature
  • Easy access to shear box
  • All parameters visually displayed on all models
  • Electronic data acquisition (See data acquisition systems under category data collection/software.)
  • Guaranteed against all defects for 2 years
  • Made in U.S.A. by Geotest
*Indicates features available only from Geotest.

Applying the consolidation load pneumatically means that virtually any sample size can be accommodated without changing weight sets, as is necessary on lever loaded units. Normal loads can be maintained within 1% at any setting and can be applied quickly. There is no effect from ambient vibration. Normal loads down to 2 lbf can be applied with actual load measured to a precision of 0.1 lbf (1N) by means of a load cell and digital display. Two cylinders permit loads of as little as 2 lbf (10N) all the way up to 2,250 lbf (10kN). Only 1 cylinder is used on S2213A .

Performing residual shear tests is automatic. The operator sets a maximum travel and then begins the direct shear test. When the preset point is reached, the machine automatically reverses direction and continues in the opposite direction past the starting point to the same distance. At that point the machine again reverses direction and goes forward to the first starting point where it again reverses automatically. This process continues until the test is concluded. Total travel in either direction can be set from 0-0.9" (23mm). Thus, even if a 4" (100mm) shear box is used, it is still possible to obtain 20% strain.

All parts in contact with water are naval bronze with some screws of stainless steel.

The entire direct shear apparatus is table top. There are no hangers or weights to store. Normal loads are applied pneumatically and displayed on a digital readout in 0.1 lbf (1N) increments on all models to a capacity of 2,000 lbf (10kN).

Shearing is done at a constant rate of strain in a drive mechanism identical to that used on Geotest triaxial compression machines. An electronic speed control stabilizes and regulates speed of the electric motor despite fluctuations in supply line voltage and in the mechanical load driven by the motor. A rapid return feature permits quick repositioning at end of test.

The upper half of the shear box is held stationary by a load cell which measures the shearing force on the sample. Extreme care in manufacturing insures that the line of thrust and the axis of the load cell coincide. The shear box rides on stainless steel roller ball bearings and hardened and ground tool steel tracks. Shearing and residual stress is also displayed on a built-in digital display, in 0.1 lbf (1N) increments to 2,000 lbf (10kN).

The outer shear box (housing) is cast and machined from naval bronze with grooves at bottom for drainage of saturation water. The inner shear box is composed of 2 pieces also machined from naval bronze. Any size shear box up to 4x4" (100x100mm) can be provided.

Geotest machines are manufactured totally in the U.S.A. Should there be malfunction in a motor or control, service depots in most major cities are available.

All models digitally display normal and shear stress. S2215A measures shear stress to an accuracy of 0.1 lbf (1N). S2213A measures normal strain and shear strain respectively with 0.5" and 1" travel dial indicators. S2215A is all digital, measuring strain with electronic digital dial indicators (EDDIs) for automatic data acquisition as each readout has its own output with plug-in connections to a PC.

Speed range (strain rate) is 0.00003 to 0.15 inch (0.0007 to 3.8mm) per minute. Actual strain rate is digitally displayed on all models and is accurately set and reproduced by use of the 10-turn graduated potentiometer. Speed is controlled to better than ±1% of set point.

All direct shear machines include 2.5 diameter by 1" or 60mm by 25mm shear box, cutting shoe and coarse porous stones for gripping specimen. Other size accessories as well as sample extruders can be provided with corresponding adjustment of price. We can also add the 2nd mini-cylinder to any earlier Geotest machine. Request information.

S2215A and S2216 report values in either English or SI units and are immediately convertible. When ordering S2213 , specify if reporting is to be in English or SI units.

All displays except rate of strain on S2215A have outputs fed into a standard connector at rear of apparatus. A connecting cable, data acquisition card and software provided allows input of control parameters, specimen and project data as well as real time display of load/deformation, consolidation curves in graphical and digital form and data storage in ASCII format.

Measurements are 30x16x18" (762x406x457mm). Standard voltage requirements are 115/60/1; for 230/50/1, add "-3" to cat. no. Specify if calibration in SI units is desired. The following models are now available.

Note that due to use of only one cylinder, S2213A can apply normal loads from 30 to 2,000 lbf (133N to 10kN). Normal load range of S2215A and S2216 is 2 to 2,000 lbf (9N to 10kN).

Cat. No.
Strain Measurement Stress Readability
S2213A       0.5, 1" (12, 25mm) dial ind.        0.1 lbf (1N)
S2215A 0.6, 1" (15, 25mm) EDDIs 0.1 lbf (1N)
S2216 0.6, 1" (15, 25mm) EDDIs 0.1 lbf (1N)

Shipping Weight: 160 lb (73kg); 10 cu.ft.

S2216 Computer Controlled Direct Shear Apparatus

It is identical to S2215A but allows for computer control of both shear and normal stress. Strain control testing is available through PID feedback control. The software allows the user to change speed and direction at any time during the test.

Computer control is also available for control of the normal stress. This will permit the user to hold vertical deflection to zero while shearing the specimen. Also, progressive larger normal loads can be programmed as part of the shearing stage or PID feedback control based on vertical displacement. Full data acquisition software is included with S2216 .

S2238W1 Direct Shear Windows Program Update

This program will update 2003 and older S2215A machines now employing a DOS based program. This version includes no hardware and must be run on a computer with an ISA card digital I/O. This program provides real time display of load/deformation, consolidation curves in graphic and digital form and data storage in ASCII format.

S2238W2 is same as above but includes a PCI card for use on newer computers.

S2239 Direct Shear Post Processing Software

This option is offered for S2215A and other direct-residual shear apparatus with suitable transducers.

All program input, such as control parameters, specimen and project data, is accomplished through simple and intuitive interactive menus. Online help is available at all times.

The data acquisition/control program provides real time display and post processing of test data:

  • Sample consolidation curves (log time or square root time).
  • Load/deformation curves.
  • Printing of engineering reports with data reduction, specimen parameters and strength results in customized formats according to user’s requirements.
  • Simultaneous data acquisition and display of more than one shear device.

Graphical data may be displayed to the computer screen or directed to a hardcopy device. Standard hardcopy devices at maximum resolution are supported in both black and white and color. Most popular dot matrix and laser printers are supported. Plots may also be output in a form which is readable by most word processors. This negates the need to cut and paste in reports.

The software requires a PC compatible computer with a 386 or better processor operating under DOS 3.1 or higher. Native OS2 versions of the program are available and require OS2 2.x or higher. A minimum of 2 MB of memory with 1 MB available extended memory, a graphics card and a hard drive are required for the DOS version. While not required, a VGA or better graphics card and a math coprocessor are recommended for optimum performance. A free demo disk is available upon request.

Related Items:
S2216. Direct Shear Apparatus, Computer Controlled
S2215A Direct-Residual Shear, digital
S2228-S2235 Shear Boxes, Cutting Shoes and Extruders
S2240 Direct Shear Machine Stand
S2215A.30 Normal Load Electronic Feed Back Control

S2215A, S2216

This item is part of the following categories:

Other items in the soils category include:

S2000 Hand Operated Unconfined Compression Tester 1500 lbf
S2001 Hand Operated Unconfined Compression Tester 500 lbf
S2002 Hand Operated Unconfined Compression Tester 2000 lbf
S2010 Economy Motorized Unconfined Apparatus 1500 lbf
S2011 Economy Motorized Unconfined Apparatus 500 lbf
S2008 Economy Motorized Unconfined Apparatus 2000 lbf
S2014 Precision Unconfined Apparatus 2000 lbf, digital
S2016 Unconfined Data Acquisition System
S2020 Unconfined Software Program
S2040 Field Unconfined Tester
S2031 Cone Penetration Apparatus
S2300 Motorized Laboratory Vane Apparatus
S2450 Large Friction-Shear Machine
S2215A Direct-Residual Shear, digital
S2015 Precision Unconfined Apparatus 2000 lbf, manual or computer
S2228-S2235 Shear Boxes, Cutting Shoes and Extruders
S2240 Direct Shear Machine Stand
S2465 Portable Tensiometer 500 lbf Capacity
S2480 Gradient Ratio Clogging of Geotextiles
S2481 Manometer Panel, wall mounted
S2482 Manometer Panel, wall mounted
E-215T Constant Head Tank
S2466 Laboratory Tensiometer 1,000 lbf Capacity
S2470 Notched Constant Tensile Load Stress Crack ResistanceApparatus
S2401 Budhu Cyclic Simple Shear Apparatus
S2600 Biaxial Apparatus
S2822 Permeability Consolidation Cell 2.5"
S2823 Floating Ring Consolidation Cell 2.5"
S2824 Fixed Ring Consolidation Cell 2.5"
E-223A Constant and Falling Head Burette Assembly, consolidation
S2610 Confining Pressure Cell
S2920 Expansion Potential Apparatus
S2843 Digicon Consolidation Apparatus
S2845 Controlled Gradient Consolidation
S2030A Fall-Cone Apparatus
E-1320 Stork motorized Cathead for Lifting Hammer
E-1314 Wildcat Dynamic Vane Log Program
E-162 Liquid Limit Set with Counter
S2900 CRS Consolidation Cell
E-1400 Nuclear Density/Moisture Meter
E-1300 Dynamic Cone Penetrometer
SI-2513 Rotary Laboratory Sifter 8/12
S6200 Basic Triaxial Test Set
S2215A.30 Normal Load Electronic Feed Back Control
U-3525 Utility Vacuum Pressure Pump
U-3528 High Vacuum Pump 2-stage
U-7000 Electronic Vacuum Gauge
U-3530 Super Capacity High Vacuum Pump
U-3528.5 Water Trap
U-3528.7 Vacuum Gauge
U-3529A Vacuum Pump Oil, 1 quart
U-3528.6 Gas Drier
S5438 Vacuum Regulator with Gauge
E-662 Automatic Soil Processor
E-653 Soil Grinder
E-660 Rapid Soil Processor
U-1741 Counter Current Batch Mixer
E-670 Soil Pulverizer
E-144 Specimen Trimming Frames
E-125 Battery Filler
E-120 Soil Mortar and Pestle
E-101-E-106 Knives
E-107-E-113 Spatulas
E-126 Wire Saws
E-210.3 Compaction Tamper
E-267 Motorized Hydraulic Sample Ejector
E-268 Manual Hydraulic Sample Ejector
E-267H Accessories For Hydraulic Ejectors
S5790 Cyclic Loading Systems
S5800 Cyclic and Static Load Frame
E-150 Liquid Limit Test Machine, Hand Operated
ALaccess Atterberg Limit Testing Accessories
E-160 Liquid Limit Test Set
E-169 Plastic Limit Test Set
E-175 Shrinkage Limit Test Set
E-178 Mercury Spill Collector
E-148 Limits and Classifications Software Program
E-200 Compaction Hammers
E-230 Compaction Molds, soil
E-245 Straight Edge
E-224 Mechanical Soil Compactor
U-1360 Shelby Tube Cutter 4.5
E-210 Harvard Miniature Compaction Apparatus
E-300 6.5´´ Sand Cone Apparatus
E-310 Field Density Plates
E-315 Sand
E-318 12,, Sand Density Cone
E-460 Volutesters (Balloon Density)
E-320 Sand Cone Density Set
S6019 Stress Path and Cyclic Triaxial Testing
E-507 Balloon Density Set
U-2150 Density Pick
E-520,1,2 Density Tools
E-915 Surface Soil Samplers
E-551 Vibrating Table 230VAC
E-561 Relative Density Set
E-558 Pouring Devices (Funnel Set)
E-554 Relative Density Mold Sets
E-557 Relative Density Gauge Set
E-530 Shovels
E-280 Pocket Penetrometer
E-284 Dial Type Pocket Penetrometers
E-285 Pocket Vane Shear Tester
E-290 Hand Vane Tester
E-286 Inspection Vane Set
U-1310-U-1316 Soil Charts
E-288 Field Inspection Vane Borer
U-1320 Soil pH Tester
U-1321 All Purpose Soil Test Kit
S2239 Direct Shear Post Processing Software
SI-2530 Gilson Testing Screen, hand clamp
SI-1425 Wash-Spray Attachment
SI-1400 Deep Frame Sieves
SI-1300 Grain Size Test Software Program
S2804 Air Loaded Consolidation Apparatus, 16 TSF
SI-1430 Wet/Dry Vibrator
SI-1440 Rocker Sieve Set
S2455 Big Shear Data Acquisition Software System
S2456 PC Controlled Direct-Residual and Friction Shear Machine
S2454 High Capacity Shear Box FS
SI-2515 Electromagnetic Sieve Shakers
SI-2506 Gilson Sieve Shakers
SI-2508 Ro-Tap Sieve Shaker
SI-2530access Testing Screen and Test-Master Accessories
SI-2532 Clean-n-Weigh Testing Screen Accessory
SI-2533 Sand Attachment Testing Screen Accessory
SI-2534 Tray Rack Testing Screen Accessory
SI-2535 Sound Compartment Testing Screen Accessory
SI-2550 Porta-Screen®
SI-2550access Porta-Screen® Accessories
S2918 Basic Swell Test Apparatus
SI-2620 Sample Splitters
SI-2630 Micro Sample Splitters
SI-2638 Gilson Universal Sample Splitters
SI-2115 S. E. Shaker Hand Operated
SI-2114 Sand Equivalent Shaker Hand Crank
SI-2100 Sand Equivalent Test Set
E-1280 TRL Dynamic Cone Penetrometer
E-128 Glass Stirring Rods
E-451 CBR Lab Set, Hand Operated
S2925A Expansion Index Apparatus
CE1036A Organic Impurities Test Set
E-161 Liquid Limit Test Set
E-1312 Shear Vane
SI-2512 ´´Mary Ann´´ Laboratory Sifter
SI-2531 Gilson Testing Screen, hydraulic
E-272A Laboratory Compaction Set
SI-2546 Gilson Test-Master®, 6 tray
SI-2547 Gilson Test-Master®, 7 tray
S6205 Triaxial Data Acquisition Set, Basic
E-151 Liquid Limit Test Machine, Motorized
E-152 Liquid Limit Test Machine with counter
E-170 Shrinkage Prong Plate
E-171 Monel Shrinkage Dish
E-173 Glass Cup
E-301 4.5´´ Sand Cone Apparatus
E-308 Plastic 1 gallon jar
(for sand cone apparatus)
E-316 Cube Test Sand
E-317 Tensile Test Sand
E-520 Chisel 1´´ wide
E-521 Rubber Mallet 1 lb
E-522 Spoon
S2012A Precision Unconfined Apparatus 2000 lbf, dial
S2213A Direct-Residual Shear, dial
S2216 Direct-Residual Shear Apparatus, Computer Controlled
S2302 Hand Operated Laboratory Vane Apparatus
S6201A Standard Triaxial and Perm Set
SI-2109 S. E. stock solution, 1 gallon
SI-2110 S. E. graduated plastic cylinder
SI-2108 S. E. stock solution, 8 ounce
E-258 Portable Sample Ejector
E-259 Portable Sample Ejector 4 and 6´´ Molds
E-430 CBR Test Software Program
SI-2551 Porta-Screen®, 7 tray model
S2808 Sensitive Weight Set
S2800 Front Loading Lever Apparatus, 16 tsf
S2802 Front Loading Lever Apparatus, 32 tsf
S2803 Front Loading Lever Apparatus, 48 tsf
S2825 Calibration Disc
S2815 Consolidation Data Acquisition System
S2818 Consolidation Post Processing Software
S2415 Test Coupon Cutter
SI-1444 Wet Sieving Accessory
S2805 Air Loaded Consolidation Apparatus, 32 TSF
S2806 Air Loaded Consolidation Apparatus, 64 TSF
S2620 Biaxial Instrumentation Set
U-3520 Oil Free Vacuum Pump
S6300 Resilient Modulus Test System
SI-2116 Mechanical Sand Equivalent Shaker
E-860 Calcium Carbonate Content Chamber
SI-1418 Deep Frame Sieves with replaceable mesh 8 in dia
S2220 DigiShear™ Automated Direct Shear System
S2215A. Direct Shear, digital
S2213A. Direct Shear, dial
E-1330 Dual-Mass Dynamic Cone Penetrometer
S2350 DigiShear™ Automated Direct Simple Shear System
U-3504 Air Compressor, 2 hp
S2216. Direct Shear Apparatus, Computer Controlled
S2810 Consolidation Test System, computer controlled
S2033 Penetrometer, Digital Semi-Automatic
S2206 Direct/Residual Shear Apparatus, Portable
E-443 Split Surcharge Weight

Other items in the direct shear category include:

S2228-S2235 Shear Boxes, Cutting Shoes and Extruders
S2240 Direct Shear Machine Stand
S2030A Fall-Cone Apparatus
S2238W1 Direct-Residual Shear Windows Program Update
S2215A.30 Normal Load Electronic Feed Back Control
S2239 Direct Shear Post Processing Software
S2456 PC Controlled Direct-Residual and Friction Shear Machine
S2454 High Capacity Shear Box FS
S2213A Direct-Residual Shear, dial
S2220 DigiShear™ Automated Direct Shear System
S2215A. Direct Shear, digital
S2238W1. Direct Shear Windows Program Update
S2350 DigiShear™ Automated Direct Simple Shear System
S2213A. Direct Shear, dial
S2215A Direct-Residual Shear, digital
S2216 Direct-Residual Shear Apparatus, Computer Controlled
S2216. Direct Shear Apparatus, Computer Controlled
S2206 Direct/Residual Shear Apparatus, Portable

Back to search page



[ Geotest Home | Customer Service | Documentation |
Geotest Catalog | Calendar | Contact Geotest ]
Geotest Instrument Corporation
241 S. Frontage Road., Suite 38
Burr Ridge,IL 60527 USA