RST Instruments Borehole Packers are pneumatically or hydraulically inflatable packers that incorporate one fixed and one sliding head attached to a center shaft. This sliding head allows the packer gland to retract about the center shaft as it inflates. The packer heads are constructed of either plated steel or aluminum while the shaft is polished stainless steel or aluminum. The packer gland consists of a rubber membrane reinforced with either polyester fabric or steel. Packers made from steel heads, stainless steel shaft and a steel reinforced gland are suitable for medium pressure applications, while packers made from aluminum heads, aluminum shaft and a polyester reinforced gland are suitable for low pressure applications. APPLICATIONS Permeability testing Hydro-fracturing of formations Monitor well sampling Sealing artesian flows in open or cased boreholes Packer piezometers Pressure grouting QUICK SPECS Steel reinforced, or fabric reinforced, abrasion resistant glands that are easily replaced in the field. Hollow center shaft for placement of sampling and monitoring equipment, or for passing water through the packer during permeability testing or hydrofracturing. RST packers are suitable for a wide variety of applications in open or cased holes. Optional sealed instrument and/or pump pass through. BENEFITS Increase Productivity Quick Delivery (common sizes) High Accuracy High Reliability

The Model 7000 Biaxial Inclinometer System monitors the lateral displacement of embankments and structures. The probe is passed along the length of a grooved tube, which is placed in the borehole or attached to the structure. The system uses digital servo accelerometers to provide precise data on the magnitude and location of lateral earth movements. Readings are displayed and automatically stored for data processing using a PDA that utilises Bluetooth Communication between the reel and PDA unit.

Tiltmeters are designed to measure tilt in structures such as buildings, dams and embankments . They can also be used for measurements related to the stability of slopes , open pits, and the walls of excavations (e.g. slurry walls). Tiltmeters are permanently attached to a structure being monitored and can make measurements on horizontal or vertical surfaces. Tiltmeters come in Uniaxial or Bi-axial configurations. Tiltmeters can be MEMS or Vibrating Wire operated. Tiltmeters can be read via remote telemetry, readout or use inbuilt logging systems.

RST Instruments Archives

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: In Place Inclinometers

The Model 7200 In Place Inclinometers utilise a series of accelerometers housed within protective tubing and linked together to continually monitor the inclination of a particular inclinometer. Application Real time inclination monitoring and datalogging of: Open cut mines Piles and caissons Unstable slopes Tunnel openings Dam walls Bridges and abutments Features Long term stability Rugged Waterproof Able to be connected to datalogging systems Reusable Specifications Standard Range: ±15 Resolution: ±0.01 mm/m (±2 arc seconds) Sensor Output: ±3 volts @ ±10 Thermistor Operating Range: _20C to +80C Dimension (single sensor): 32 mm _ 187mm long Weight (single sensor): 0.4 kg

Q: Rstar Radio Logging Network

RSTAR Array Radio Series uses wireless technology to provide automated data acquisition. Deployed in a star topology from a continuously active L900 Rstar Hub Array based on 900Mhz range or 2.4Ghz spread spectrum depending on the country. It covers the majority of the DT logger range. Excellent Hub Range up to 14km in open country Ultra-low quiescent power. (Nodes powered by 1 x Lithium battery with up to 7 years life. Simple star or spoke wheel routing - NO Mesh Up to 255 L900 nodes Simple node set up Based on proven FLEXDAQ experience and technology Multiple telemetry options Data accessed at multiple locations Data protected at all stages by encrypted, error corrected transmission and storage

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 Readout

The Model 9120 Vibrating Wire Readout is an easy-to-use readout device intended for "pluck" type vibrating wire sensors. The readout offers excellent resolution and accuracy. Readings are displayed in frequency squared units compatible with all sensor calibration data and reads thermistors. Application Measurement of: Vibrating Wire Piezometers Vibrating Wire Strain Gauges Vibrating Wire Stress Cells Vibrating Wire Pressure Cells Vibrating Wire Temperature Gauges Features Stable readout High resolution Excellent sensitivity Long term stability Easy operation Direct reading in -frequency squared units Low power CMOS design Large character LCD display Low battery indicator Protective vinyl carry case Specifications Range: 250 to 25000 Hz2 x 10-3 Accuracy: ± 0.05 % full scale Resolution: 0.01% full scale Excitation: 4 volt p-p square wave Cable length: 1500 metres maximum Operating temperature: -10 to 70C (0 to 50 recommended) Battery life: Min of 16 hours continuous operation Dimensions: 200mm x 100mm x 45mm Weight: 500 g

Q: Vibrating Wire Single Channel Data Logger

The Vibrating Wire Single Channel Data Logger is a low cost, battery powered data logger, designed for reliable, unattended monitoring of a single vibrating wire sensor and thermistor. Data logger setup and data collection is done using the Ultra-Rugged Field PC or a laptop. Multi-Channel or Host Software is also included. Application Measurement of: Vibrating Wire Piezometers Vibrating Wire Stress Cells Vibrating Wire Pressure Cells Vibrating Wire Temperature Gauges Vibrating Wire Crackmeters Features 128K memory Weather resistant NEMA 4X (IP65) enclosure 100 year memory backup User friendly Windows host software included at no additional cost Data stores in CSV format and opens in Microsoft Excel Communication: RS232 Specifications Memory: over 30,000 records including: time, one channel frequency & one channel temperature Frequency accuracy: 0.01% full scale Resolution: 1 part in 65,000 Temperature range: -40C to 60C Power source: 2 -AA batteries Battery life: over 5 years/20 memory fills depending on temperatures and use Dimensions: 150mm x 65mm x 40mm Weight: 470 g

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