Adhar Instruments & Services

Sector 10, Noida, Uttar Pradesh

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.

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.

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.

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 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.

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