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E31.2 E32.2

Magnetic Extensometer

Geo-XM, Magnetic Extensometer,components, GeosenseThe Geosense® GEO-XM settlement system is used typically to monitor settlement and heave in foundations, excavations and embankments. Settlement is identified at the depth/position where the settlement has occurred and as well as measuring the total amount of settlement.

The GEO-XM soil extensometer comprises a series of magnetic targets positioned so that they move freely outside flush jointed access casing or inclinometer casing. The targets may be 3 or 6 Leaf “Spider” targets, magnetic settlement plates or magnetic joints.

Settlement is measured by the relative position of the magnetic targets using a Reed Switch Probe that detects the magnets lowered down through the central access casing. Inclination where desired is measured using a portable inclinometer

Features of Soil Extensometer

  • Measures Total & Incremental Settlement 
  • Simple to Install 
  • Can be used with standard Reed Switch Probe

Applications of Soil Extensometer

  • Excavations 
  • Embankments 
  • Dams 
  • Tunnels 
  • Foundations

GEO-XM Settlement layouts

Geo-XM, 100 Series, 200 Series, 300 Series, Diagram

GXM-100 Series Specifications

GXM-100 Series, Components, Magnetic ExtensometerGXM-100, 100P & 100T use un-keyed access casing to monitor only settlement or heave in foundations.

Access Casing Specifications

Access Casing OD

33 mm

Access Casing ID

25 mm

Access Casing Length

1.5 or 3 m

Access Casing Weight

0.6 kg/m

Bottom Cap OD

33 mm

Material

PVC

 

Access Casing Telescopic Section Specification

Telescopic Section OD

42 mm

Telescopic Section ID

35 mm

Length

500 mm

Weight

0.55 kg

Material

PVC

 

Access Casing Magnetic Target Specifications

Spider Magnets

3 & 6 Leaf *

Magnet Targets

35 x 60 mm

Plate Magnet Target

33 x 300 mm

Datum Target

33 x 60 mm

GXM-200 Series Specifications

GXM-200 series, componentsGXM-200, 200P & 200T use inclinometer casing so that the combined system can monitor settlement, heave and also inclination with the use of a portable inclinometer.

Inclinometer Casing Specifications

Casing OD

70 mm

83 mm

Casing ID

59 mm

71 mm

Casing Length

1.5 or 3 m

Casing Weight

1.27 kg

1.35 kg

Material

ABS

Groove Spiral

< 0.005 Rad / 3m

Bottom Cap OD

70 mm

83 mm

 

Inclinometer Casing Telescopic Section Spec.

Section OD

70 mm

83 mm

Compressed Length

508 mm

Extended Length

660 mm

Range

152 mm

Weight

0.77 kg

0.90 kg

Material

ABS

Groove Spiral

< 0.005 Rad / 3m

 

Inclinometer Casing Magnetic Target Spec.

Spider Magnets

3 & 6 Leaf *

Spider Target Chain

300 mm

400 mm

Spider Target

Release Pin

Magnet Target

100 x 70 mm

110 x 85 mm

Datum Target

100 x 70 mm

110 x 85 mm

* 6 Leaf targets only size suitable for high settlement regions with many telescopic joints

GXM- 300 Series Specifications

The GXM-300 & 300i series surround either access casing or inclinometer casing with a flexible corrugated pipe that moves freely. It is intended for use in regions where high settlement is expected.

Corrugated Pipe Specifications

Pipe OD

42 mm

Pipe ID

35 mm

Length

3 m or 50 m Coil

Magnetic Target/Coupler

42 x 50 mm

Material

PE

Bottom Cap

43 mm

Ordering Information

  • Geo-XM Variety
  • Depth of installation
  • Target type
  • Number of magnetic targets and datum magnets
  • Reed switch probe range
  • Installation tool range

Accessory Specifications

Reed Switch Probe

30, 50, 100, 150, 200 m

Installation Tool

30, 50, 100, 150, 200 m

Mastic Tape

10 m

VIC:

Melbourne

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t (03) 9938 3830

m 0428 315 502

NSW:

Sydney

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t (02) 9986 1857

m 0418 381 709

QLD:

Brisbane

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t (07) 3040 6166

m 0419 477 715

WA:

Perth (Head Office)

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t (08) 9322 4020

m 0408 034 668

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