Hill India GT Road Industrial Area, Ghaziabad, Uttar Pradesh

The Model 4675LV is a water level monitoring system that uses a vibrating wire force transducer to provide a highly stable and sensitive means of monitoring water levels. The main component is a cylindrical weight suspended from the force transducer. The cylinder hangs partially submerged in the water whose level is to be monitored. As the water level changes, the changing buoyancy force on the cylinder acts directly on the vibrating wire transducer and alters its tension, and hence its resonant frequency.

The Solinst Model 101 Water Level Meter is available in several versions and is considered the industry standard for portable, hand-operated measurement of water depth in wells, boreholes, standpipes and tanks. They are sturdy, easy to use and provide accurate results to the millimeter, or to 1/100 ft. The Model 101 Water Level Meters feature pressure-proof stainless steel probes rated to 500 psi, laser marked PVDF tapes, indicator lights and audible alarms.

Fiber Optic Temperature Sensors are designed for use in environments where high levels of electrical interference exist or where intrinsic safety is an issue. The FP4700 uses the temperature-dependent birefringence of a specially selected crystal as the temperature transduction mechanism. This crystal does not show thermal creep or aging as with some other fiber optic sensors.

The Model FP4000 Fiber Optic Strain Gages are designed for use in environments where it may be difficult to use conventional types of strain gagesbecause of space considerations, high levels of electrical interference or where intrinsic safety is an issue. Measurements of dynamic events are also possible with these gages and the requisite dataloggers. The strain gages have a very low coefficient of thermal expansion and can be used to measure both mechanical and thermo-mechanical strains in a variety of different materials.   The accuracy of the OSP sensors is determined by sample testing of controlled batches at the factory. The manufacturing technique results in the spans shown above and is confirmed by actual strain tests performed on samples from batch lots. ²Other ranges available on request.

The Model 4100/4150 Strain Gage has a 51 mm gage length (3000 µε range, 1 µε sensitivity) and is designed to measure strains in steel structures (4100) and on reinforcement bars (4150) where space may be limited. The gage is installed quickly and easily by means of a capacitive discharge spot welder or, for short-term use, with special epoxy adhesives; the latter method of attachment permits the use of this gage on concrete.

The Model 4435 Soil Extensometer is designed to be installed, in series, to measure horizontal strain and settlements in earthfill or rockfill dams. The 4435 has flanges on either end, which enable a series of extensometers to be bolted together forming long strings of sensors so that complete profiles of deformation or settlement can be monitored.

The Model FP4911 Fiber Optic Rebar Strainmeter is designed for measuring strains in foundations, slurry walls, precast piles, caissons, bridge abutments, tunnel liners, etc. The standard Model FP4911 (#4 rebar), known as the “Sister Bar,” is installed alongside structural rebar. The Fibre Optic element employed in this sensor makes it particularly suitable where dynamic measurements are to be made and/or on projects where other fiber optic sensors are deployed.

The Model A-9 Retrievable Extensometer (Patent No. 5,585,555) is designed to measure deformations in boreholes in rock, concrete, and other construction materials. The device can be used in pile load test studies, plate jacking tests and virtually any application where a hole can be drilled or a pipe can be cast into the structure being studied. The system features adjustable gage lengths, rapid and simple installation/removal and high accuracy using a variety of transducers including Vibrating Wire and DCDT’s. Adapters for use in square tubing are also available.

The Model 4500MLP system overcomes the problems associated with the installation of multiple piezometers in a single drill hole. The 4500MLP is lowered into position and a spring loaded apparatus is actuated forcing specially configured piezometer filter elements into firm contact with the borehole walls. The borehole is then grouted from the bottom in one quick and simple operation.

The Model 4422 is a miniature crackmeter intended to measure displacements across surface cracks and joints. It has been specially designed for applications where access is limited and/or where monitoring instrumentation is to be as unobtrusive as possible (e.g. on historical structures or buildings).

Standard Range : 6 mm (±3 mm)

The Model 1900 Magnetic Extensometer is designed to measure settlement or heave of soft ground under the influence of loading or unloading due to the construction of embankments, fills, buildings, foundations, and structures. A probe is lowered inside a telescoping guide tube to detect and measure the position of magnetic anchors located around the guide tube at various depths along the borehole or within the fill. Plate anchors are used in fill and “spider” anchors in boreholes.

High-Temperature Pressure Transducers are designed for monitoring downhole pressures and temperatures in oil recovery systems and geothermal applications, where the temperature may be as high as 250°C. These sensors are supplied with either mineral insulated cables or Teflon® cables inside stainless steel tubing.

The Model 4400 Embedment Jointmeter is designed for use across construction joints, such as those between adjacent blocks in a concrete dam. It is normally embedded across the joint to monitor the expansion or contraction of the joint. The use of internal universal joints allows for a degree of shearing motion.

The Model ST-350 Dynamic Strain Transducer is used for structural testing and recording strains on steel structures, post-tensioned and pre-stressed concrete structures, etc., and for any structure in which a short-term live-load can be applied. The Model ST-350 is delivered pre-wired in a rugged housing that is easy and quick to install in any weather. These transducers are field-proven and have been used for more than 20 years to record strain measurements on all types of structures, often in harsh field conditions.

Drive Point Piezometer has the transducer located inside a housing with an EW drill rod thread and removable pointed nose cone. This model is ideally suited for use in peat and soft clays. The piezometer may be recovered at the end of the job. Models are also available which use metric threads allowing for installation using conventional cone penetrometer or other drill rods with adapters.

The 4573 Series are battery powered downhole water level and temperature data loggers well suited for recording water levels and temperatures in shallow wells, streams, lakes and freshwater wetlands. For saltwater deployments, such as brackish wetlands and tidal areas, the Model 4573-2 should be used. The 4573-1 (s/s) and 4573-2 (Titanium) are available in 4 pressure ranges with measurement accuracies between ±0.075% F.S. and ±0.05% F.S. For less demanding applications and/or where cost is a consideration, the Model 4573-3 with a polypropylene housing is available in 3 pressure ranges, with measurement accuracy ±0.1% F.S.

The Model 4450 Displacement Transducer provides remote readout capability for borehole extensometers. They are particularly useful where other types of vibrating wire sensors are used and/or for installations where long cable runs are required. The Model 4450 can also be installed between borehole anchors, in conjunction with the requisite length connecting rod, to provide a permanent, in-place incremental extensometer.

The Model 4430 Deformation Meter with flanged ends is designed to measure longitudinal deformation in dams and embankments. It can also be grouted or held in place by hydraulic anchors to measure deformations in boreholes (over the gage length). Gage lengths from 0.5 to 100 meters are available.

The CLP-NB Load Cell has a column type strain sensing element. With a full line of products with capacities ranging from 10kN to 10MN, customers can select a model for any load level. Two independet output type are also available on request. Protection ratings : IP 65 equivalent Features Many load ranges, Possible selection according to purposesEasy handling

Borros Type Hydraulic Anchor | For use in soft soils and clays, especially in augered boreholes. Can also be driven directly through soft ground without a borehole being required (please see theModel 1950 data sheet). Groutable Anchor | The preferred anchor for use in downward-directed boreholes. The preassembled extensometer is installed in the borehole and is then filled with cement grout. These anchors can also be used in upward-directed boreholes with a more complicated grouting procedure. Hydraulic Anchor | For use in rough boreholes in rock and soft ground, especially if dilations and contractions of the borehole are anticipated. Also useful in upward directed boreholes with or without grouting. Snap-Ring Anchor | For use in hard or competent rock where smooth uniform boreholes can be drilled. The simplicity of its design allows for quick and easy installation.

Addressable Thermistor String is a variation of the Model 3810 Thermistor String, which uses addressable thermistor sensors installed on a 2-pair cable. This configuration allows up to 256 sensors to be installed on a single, 6 mm diameter cable up to 2000 m in length.