8/12/2019 Ess Geos 5508 Embed Straingauge Rt Em

1/2

Long-term reliability

High resolution and

accuracy

Adjustable 3000 mi-

crostrain range

Very high compliance

Rugged construction

Temperature reading Flanges fitted with

mounting holes

Frequency signal

easy to process andtransmit over longdistances

The EM Series of VibratingWire Strain Gauges are de-signed for concrete embed-ment in order to measurestrains caused by stressvariations. The stress canalso be evaluated when theconcrete's modulus of elas-ticity is known, followingcompensation for tempera-ture, creeping and concretereaction effects. The EM isembedded in structuressuch as:

Dams

Nuclear power plants

Bridges and overpasses

Tall buildings

Tunnels

Harbours

Foundations, walls, lin-

ings, footings, and piles

The EM is composed of two endpieces joined by a tube that pro-tects a length of steel wire. Thewire is sealed in the tube by aset of O rings on each endpiece. Both end pieces have a

flat circular flange to allow trans-fer of concrete deformation tothe wire. An electromagnet is fit-ting at the centre of the gauge.Strain developing in the con-crete modifies the tension in thewire and its resonant frequency,which is read by the electromag-net.

The EM-5 is the standard modeland is used in different types ofstructures as mentioned above.

The EM-l0 consists of a ruggedversion to be embedded in con-crete with coarse aggregates.

The shorter EM-2 model is de-signed for laboratory use or forlimited spaces.

Unless specified otherwise, thegauge tension is factory-adjusted at mid-range.

The gauge is very compliant. Itdoes not induce stresses in the

host media and can therefore be

embedded in young curing con-crete as well as in hard, syn-thetic materials such as resins,fibreglass and urethane.

A thermistor incorporated intothe EEM supplies informationon the effects of temperature

on the materials.

GEOSYSTEMS

Geotechnical Instrumentation Design, Manufacture, Installation, Data Acquisition, On-Line Monitoring

Embedded VW Strain GaugesModel 5508-RT-EM Series

EmbeddedVWStrainGa

ugesModel5508-RT

-EM

Series

Description

FEATURES

Email: info@geosystems.com.au Website: www.geosystems.com.au

For Further Information Contact: Geosystems Australia Pty Ltd, 20 William Street East, LilydaleVICTORIA 3140, AUSTRALIA Tel: 61 3 9735 5255 Fax: 61 3 9735 5277

APPLICATIONS

environmental systems & services| 8 River Street, Richmond VIC 3121 Australia

T + 61 3 8420 8999 | F + 61 3 8420 8900 | geotechnical@esands.com | www.geosystems.com.au

FOR FURTHER INFORMATION

8/12/2019 Ess Geos 5508 Embed Straingauge Rt Em

2/2

EmbeddedVWStrainG

augesModel5508-RT-EM

Series

For Further Information Contact: Geosystems Australia Pty Ltd, 20 William Street East, LilydaleVICTORIA 3140, AUSTRALIA Tel: 61 3 9735 5255 Fax: 61 3 9735 5277

Email: info@geosystems.com.au Website: www.geosystems.com.au

There are several ways toinstall the gauge: Attaching it to a rebar with

tie wire Inserting it directly into wet

concrete or grout

Pre-casting it in briquettewith the same mix for sub-sequent embedment

A mounting rosette that al-lows gauges to be preciselyoriented is offered as an ac-cessory. Also offered is a"no-stress" strain gauge thatconsists of a compressiblecylinder filled with the con-crete mix from the mass be-ing poured.

This unit, containing an EM,is placed adjacent to thegauge installation and isused as a reference to meas-ure any internal variation ofstrain in the concrete due toageing, temperature, humid-ity and factors independent ofexternal loads.

Portable readout units

(MB-6T(L), PAMETO VW)

Data acquisition system

(SENSLOG)

Rosette mounting block

"No-stress" strain gauge

Terminal and junction

boxes.

Lightning protection box

Splicing kit

Type of thermistor and

cable

Installation

Specifications

Due to on-going design improvements and reviews, we reserve the right to amend product and specifications without prior notice

Accessories

Options

Model: EM-2 EM-5 EM-10

Strain Range: 3000

Resolution: - Wire:- Temperature:

0.4 1 (min.) 0.4

Operating Temperature Range: -50C to +60C

Thermistor: -Type:- Accuracy:

3 kW (2 kW optional) 0.5% F.S.

Electrical Cable: - IRC-41A (standard): 2 twisted shielded pairs 22AWG, 6.2 mm O.D., PVC jacket

- IRC-41P (optional): identical to IRC-41A exceptthat jacket is polyethylene

environmental systems & services| 8 River Street, Richmond VIC 3121 Australia

T + 61 3 8420 8999 | F + 61 3 8420 8900 | geotechnical@esands.com | www.geosystems.com.au

FOR FURTHER INFORMATION