Other Products / Services #2508091

The water seepage can be monitored using weir which is made of stainless steel in 90 'V' shape.This can be designed for different size of channel and different flow capacity.The 'V' Notch have marking for measuring flow rate. It is available for 20l/s, 25l/s, 30l/s, 50l/s and 60l/s.

Surface settlement point is made of steel rod having 25mm dia, 250mm length and cross mark on top. The surface settlement points are used to monitor the surface settlement of structures. It is generally installed at the surface of structures using concrete block so that it is in contact with surface which tends to move. The monitoring is done using precise Total Station.

Electronic Water level indicator is used to measure the water levels in wells, casagrande porous tube piezometer and stand pipe piezometer.

Vibrating wire sensor is designed to measure the water level of reservoir/bore well remotely. It has special arrangement of vent tube to nullify the atmospheric pressure and measure exact water level. The data can be recorded using data recorder or data acquisition system.

The magnet extensometer is used to monitor settlement and heave in excavations, foundations, dams, and embankments. It can also be installed behind retaining structures, such as sheet piles and slurry walls, and above underground openings, such as tunnels and shafts. Data from the extensometer indicate the depths at which settlement has occurred as well as the total amount of settlement.

Embedment strain gauges measure strain in concrete. It can be used in multi directions using rosette to know the direction of strain in mass concrete. Typical applications include:

• Measuring strains in reinforced concrete and mass concrete.
• Measuring curing strains.
• Monitoring for changes in load.
• Measuring strain in tunnel linings and supports.

No-Stress -Strain Meter is installed in conjunction with group of strain meters in mass concrete in a special container where no external force is acting on strain gauge embedded in concrete. The data of No Stress-Strain meter is required to evaluate the strain gauge data to find out true strain.

Vibrating wire surface mountable strain gauges are used to measure strain in steel or strain in concrete and masonry structures. Typical applications include:

• Monitoring structural members of buildings and bridges during and after construction.
• Monitoring load in struts used to brace deep excavations.
• Measuring strain in tunnel linings and supports.
• Monitoring areas of concentrated stress in pipes.
• Monitoring distribution of load in pile tests.
• Monitoring cracks in concrete (may require long-base strain gauge).

Total Pressure cells are designed to measure stress action on plane surface. It measures the combined pressure of effective stress and pore-water pressure. The pressure cells are constructed from two circular stainless steel plates, welded together around their periphery. The annular space between these plates is filled with oil. The cell is connected via a stainless tube to a transducer forming a closed hydraulic system. The stress then converted to a signal and may be remotely read in a portable read out unit or data logger. Typical applications include:Monitoring total pressure exerted on a structure to verify design assumptions. Determining the magnitude, distribution, and orientation of stresses.

Vibrating wire concrete Pressure cells are used for the measurement of tangential and radial stresses in concrete and shotcrere tunnel linings. The typical application includes:

• Pressure on and within linings of underground excavations
• Monitoring of stress distribution within rock

Inclinometer casing is permanently installed in a borehole that passes through suspected zones of movement. Inclinometer casing can also be embedded in fill, buried in a trench, cast into concrete, or attached to a structure. Important features of casing include the diameter of the casing, the coupling mechanism, groove dimensions, straightness, and the strength of the casing.

Vertical inclinometer provides accurate profile of lateral deflection in two perpendicular planes.

• Monitoring slopes and landslides to detect zones of movement and establish whether movement is constant, accelerating, or responding to remedial measures.
• Monitoring diaphragm walls and sheet piles to check that deflections are within design limits, that struts and anchors are performing as expected, and that adjacent buildings are not affected by ground movements.
• Monitoring dams, dam abutments, and upstream slopes for movement during and after impoundment.
• Monitoring the effects of tunneling operations to ensure that adjacent structures are not damaged by ground movements.

The rod extensometer monitors changes in the distance between one or more downhole anchors and a reference head at the borehole collar. Typical applications include:

• Monitoring settlement in foundations.
• Monitoring subsidence above tunnels and mines.
• Monitoring heave in excavations.
• Monitoring the stability of tunnels and other underground openings.
• Monitoring deformation in abutments and walls.

The tape extensometer is used to detect and monitor changes in the distance between two reference points. Typical applications include:

• Monitoring convergence of tunnel walls.
• Monitoring deformations in underground openings.
• Monitoring displacement of retaining structures, bridge supports, and other structures.

The VW crackmeter is used to monitor movement at joints and cracks in concrete structures or rock. Typical applications include:

• Monitoring joints for unexpected movement to provide early warning of performance problems
• Monitoring joints and cracks in structures that may be affected by nearby excavation and construction activities.
• Monitoring cracks in structures that have experienced seismic activity.

Optical target (Bi-reflex) is used to monitor the deformations in 3 dimensional at a point. Its application includes convergence monitoring of tunnel, caverns and surface movements in dam.Optical range : 250m with preciseTotal Station

Prism targets are used to monitor the deformation and convergence in underground activities. It has great advantage over bi-reflex target as more precise monitoring, long distance coverage etc. Features Precision ground glass up to 2 arc second Fully compatible with leading manufacturer's Total Stations like Sokkia, Trimble, Topcon, Pentax, Nikon, Stonex etc. Hermitically sealed 62.5mm precise prism

10-position switch cum junction box is suitable for connecting and switching input from up to 10 sensors through ten 4 core input cables to readout unit and to one output cable.

The vibrating wire data recorder is microprocessor based recorder designed to measure most types of commercially available vibrating wire instruments requiring a sweep excitation signal.The recorder is portable, robust, and suitable in harsh environments. It is capable of storing and displaying time and date stamped engineering unit data. The recorder will also simultaneously measure the thermistor which is commonly incorporated in to vibrating wire instruments and display the reading in C.

12hours in continuous use.Resolution : 0.1 micro secondData Recording Unit : Period, frequency, frequency square, engineering unit.Communication Port : RS 232Display : 16 characters one lineOperating Temperature : -10 to +60CTemperature Measuring : ThermistorMeasurement Cycle : 128 CyclesMemory : EPROM Program Memory & (NVRAM) Data MemoryReal Time Clock : RTC is provided for time & date Steaming of Stored Data, Accuracy 2 minutes / month

Generally large numbers of sensors are installed in geotechnical and structural monitoring. The data acquisition system is installed to acquire data from these instruments. The data acquisitions system is built around the Campbell Scientific CR 800 and CR 1000 modules can be used with other supporting parts like vibrating wire interface, multiplexers to increase the Number of channels. Features:

• Rugged with low power consumption
• Powered by mains, battery or solar panel
• Internal memory up to 4MB and can be increased
• through compact flash module (CR 1000 only)
• Stores up to 20, 00, 000 data points
• Data can be retrieved by GSM, GPRS, E-mail, TCP/IP
• 2.4GHz Radio modem.
• Reads most sensors common to geotechnical and structural instrumentation
• Alarm trigger facility
• Output data in simple ASCII format enables easy importing

Temperature sensors are used to monitor the heat of hydration in mass concrete structures. Sensor Type.

• Vibrating wire temperature sensors offer high accuracy and are convenient when other types of VW sensors are used.
• Resistance temperature sensors (RTDs or Thermistors) are an economical alternative to the vibrating wire sensor.

The normal & inverted plumb lines are used for accurate measurement of horizontal movements associated with the rotation or tilting of a structure. The typical applications are determination of deflection of dam, horizontal movement of dam foundations, abutments, bridges, piers and tall buildings. Inverted and normal plumb lines are installed in same structure.

Tilt Sensors are used to monitor changes in the tilt of a structure. Such changes may be caused by excavation, tunneling, dewatering, or loading of the structure. Typical applications for tilt sensors include:

• Monitoring stabilization measures, such as pressure grouting and underpinning.
• Monitoring structures for the effects of tunneling and excavating.
• Monitoring the deflection and deformation of retaining walls.
• Monitoring convergence and other movements in tunnels.
• Providing early warning of threatening deformations, allowing time for corrective action to be taken.