Electrical Uplift Pressure Sensor

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Description

Uplift pressure measuring device consists of a perforated/non-perforated pipe of 50 mm dia of adequate strength. The pipe is inserted in a drilled hole in the foundation from the instrumentation gallery to the required depth. To the other end of the pipe in the gallery model EPU-20Vuplift pressure sensor is connected.

Model EPU-20V uplift pressure sensor incorporates the latest vibrating wire technology to provide remote digital readout of fluid and/or water pressure in standpipes, bore holes and embankments. It is similar to the model EPP-30V piezometer except that instead of the special filter, a 25 mm BSP adaptor is provided for the pipe connection. The water oozing through internal pores or seams in rock formations of dam foundations, mass concrete /foundation soil of structures, reclaimed land soil etc. percolates upward through the pipe to the sensor

Specification

Range (MPa)0.2, 0.35, 0.5, 1.0, specify
Accuracy

± 0.25 % fs normal

± 0.1 % fs optional

Non linearity± 0.5 % fs
Resolution0.025% fs
Over range limit150 % of range
Temperature limit-20°C to 80°C
ThermistorYSI 44005 or equivalent
Dimension (dia x L)42 x 210 mm

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Instrument Name

Uplift pressure sensor

Sensor Type

Vibrating wire

Construction

25 mm BSP adaptor is provided for pipe connection, in place of filter

Application

Monitor uplift pressure of water in foundation of dams and concrete structures

Parameter

Uplift pressure

Range (kN)

0.2, 0.35, 0.5, 1.0 MPa; specify

Key Testing / Calibration

Thermal cycling (-20 to +80°C), Pressure cycling (2000 cycles), individually temperature compensated, reverse pressure test, individually calibrated providing high accuracy & repeatability

Key Feature/Advantage

Hermetically sealed with electron beam welding

Protection (Waterproofing)

IP-68, water resistant up to its full range

Dimension (mm)

42 Ø x 210 L

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