The Cable Bolt Load Cell consists of up to 6 vibrating wire transducers housed within the perimeter of the cell that are used to determine the load being placed upon it. The Model 5010 cell is a hollow cell used for bolt load determination. The Model 5015 cell is a solid cell used as a direct load bearing unit.

The Model 4510 Tape Extensometer is a portable unit designed to measure the relative distance between reference anchors fixed to the excavation or structure. Both grouted and expanding anchors are available. Application Measurement of displacements in: Underground mining Bridge abutments Concrete dams Concrete structures Tunnels and Shafts Features Rugged simple design Applicable in any orientation Digital display Automatic tensioning system Rapid one man operation High accuracy and reliability Portable device in sturdy carry case Specifications Tape ranges: 20m Accuracy < ±0.1 mm Resolution: 0.05 mm Tension on tape: 150 N Dimension: 40mm x 60 mm x 550mm long Weight: 2 kg

Geokon Archives - HMA Group

Q: Geokon Hydrostatic Profiler System

The Model 4875 Gekon Hydrostatic Profiler System is designed to measure heave/settlement at intervals along a semi-rigid access tube. The system consists of a probe which is physically dragged through a horizontal access tube. Using hydraulic fluid within the system the depth of the probe measured with respect to the reference reservoir. By comparing profiles taken at different times, the heave/settlement of earth structures can be determined. Application Measurement of vertical displacement in: Embankments Tailings dams Road ways Foundations Features Simple installation Vented sensor to eliminate barometric pressure fluctuations Capable of interrogation by variety of readouts and loggers Specifications Sensor range: 0 - 7 metres head of water Sensor accuracy: 0.1% full scale Sensor resolution: 0.025% full scale Temperature range: -20C to +80C Dimension: 35 mm OD, 203 mm long (probe) ,178 mm wide x 610 mm high (reel) Weight (probe with 300m reel): 77 kg

Q: Hydraulic Earth Pressure Cell

The Model 2000 Hydraulic Earth Pressure Cell is fluid filled and connected to any of the series 1000 diaphragm piezometers, which act as the pressure transducer (see model 1100 and 1200 for details). The cells are suitable for measurement of total pressure against walls and in embankments, fills and any other earthen mass. The Model 2050 is similar to the 2000 but is fitted with a post stressing pinch tube, which allows recoupling of the cell to concrete after curing. Application Hydraulic Earth Pressure Cells are designed to measure stress acting on a plane surface and are typically installed in: Dams and earth embankments Foundations, retaining walls and piles Against pipelines and culverts Against and under buildings In railroad ballast Beneath raft foundations Paste backfills Features Long term stability High accuracy and sensitivity Simple installation Can tolerate long cable lengths Waterproof design Fitted with thermistor Due to inherent high sensitivity it is not necessary to produce a large strain in the area monitored to create stress. Able to be connected to data logging systems Specifications Pressure ranges: (kPa) 350, 700, 1000, 2000, 3000, 5000 Accuracy: <± 0.5% full scale Resolution: 0.025% full scale Operating temperature: -20 to +65C Connecting tube length: 300mm Dimension: 230mm, 20mm thick Weight: 1.8 kg

Q: Vibrating Wire Embedment Strain Gauge

The Model 5110 Vibrating Wire Embedment Strain Gauge is used for measurement of internal strains in concrete. With a gauge length of 153mm and on operating range of 3000ms, the gauge vibrating wire resmont frequency is read and converted to microstrain. Application Measurement of embedded strains in: Bridges Dams Tunnel Linings Piles Caissons and Shafts Features Rugged design Highly sensitive Simple installation Excellent long term stability Waterproof design Fitted with thermistor Standard range: 3000 __ Accuracy: ±0.1% full scale Resolution: 1 __ Temperature range:-20C to +80C Active gauge length: 153mm Dimension: 19 mm x 155mm long Weight: 90 g Able to be connected to datalogging systems Not affected by long cable lengths

Q: Vibrating Wire Stressmeter

The Model 3100 Vibrating Wire Stressmeter is a rigid inclusion cell suitable for monitoring uniaxial stress changes in hard and soft rock Applications. The stainless steel proving ring is wedged inside the borehole using either percussive lever screw or hydraulic setting tools. The cells are capable of measuring up to 70MPa. A sensitive, low range model is available for coal Applications. Available in EX (37mm to 39mm), BX (58mm to 61mm) and NX (74mm to 77mm) boreholes sizes. Application For stress change monitoring in: Underground mines Tunnels Support pillars Deep excavations Shafts Features Corrosion resistant Waterproof Long-term stability Suitable for remote readout Rugged construction Fitted with thermistor Not affected by long cable lengths Able to be connected to datalogging systems Specifications Compression range: 0-70 MPa Tension range: 0-5 MPa Operating temperature: -20 to +60C Borehole diameter: 37-77 mm Maximum borehole depth: 30 m Dimension: 41 mm x 28 mm long Weight: 0.25 kg Dimension(EX): 29 mm x 44 mm long Dimension(BX): 48 mm x 70 mm long Dimension(NX): 64 mm x 76 mm long Weight(EX): 0.45 kg Weight(BX): 0.90 kg Weight(NX): 1.4 kg

Q: Vibrating Wire Surface Mount Strain Gauge

The Model 5120 Vibrating Wire Surface Mount Strain Gauge is used for the measurement of surface strains on concrete, steel and other materials. It fundamentally operates like the Model 5110 gauge but is mounted using steel end blocks to the surface of the structure. Application Measurement of surface strains in: Bridges Dams Tunnel Linings Piles Caissons and Shafts Features Rugged design Highly sensitive Simple installation Excellent long term stability Waterproof design Fitted with thermistor Able to be connected to datalogging systems Not affected by long cable lengths Specifications Standard range: 3000 __ Accuracy: ±0.1% full scale Resolution: 1 __ Temperature range:-20C to +80C Active gage length: 150mm Dimension: 19 mm x 155mm long Weight: 90 g

Q: Vibrating Wire Tension Load Cell

The Model 5000 Vibrating Wire Tension Load Cell can be used in any tension monitoring Applications. For easy Application, the cell Features female threads in each end. Custom sizes are available. Application Measurement of tensile loads in: Structural members Geofabric Process weighing systems Features Long term stability Rugged construction Waterproof Fitted with thermistor Able to be connected to datalogging systems Not affected by long cable lengths Specifications Measuring range: 100 kN Accuracy: ±0.1% full scale Resolution: ±0.025% full scale Over range: 150% full scale Temperature range: -20C to +80C Dimension: 19 mm x 204mm long Weight: 400 g

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