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Smartec Magnetic Reed Switch Probeb Extensometer

Smartec Magnetic Reed Switch Probeb Extensometer

Model:Smartec Magnetic Reed Switch Probeb Extensometer
Country of Origin:Switzerland
Use:The R-4 is used to manually measure settlement or heave of soils at various depths, which allows producing a settlement/heave profile.

DESCRIPTION

The R-4 magnetic probe extensometer consists of an array of magnetic targets, surrounding a common access pipe, positioned at different depths along the length of a borehole or the height of an embankment or fill.

A reed switch probe, lowered down the access pipe, detects the position of the magnet anchors outside the tube. The probe is suspended by a single graduated tape that incorporates the electrical leads. The tape graduation is used to determine the deformation between magnetic anchor points along the pipe’s axis.

The magnetic anchors are available in two configurations: leaf spring anchor, for borehole installation, and plate anchor, for embankment or fill installation. The leaf spring anchor can be pushed in place or lowered with the access pipe and released with an external draw wire.

The plate anchor consists of a plate with a central hole. The plate anchors are installed with the access pipe as the construction of the embankment or fill proceeds. Telescoping access pipes are used where deformations exceeding 1% are expected. The R-4 system is compatible with standard inclinometer casings. The use of a probe centralizer is recommended for repeatable readings.

SPECIFICATIONS

R-4 READOUT UNIT (probe, reed switch, cable and reel)

Model No. 

FR-R4-30M 

FR-R4-50M 

FR-R4-100M 

FR-R4-150M 

FR-R4-100F 

FR-R4-300F

Probe diameter

16 mm 

16 mm 

16 mm 

16 mm 

16 mm 

16 mm 

Probe length

230 mm 

230 mm 

230 mm 

230 mm 

230 mm 

230 mm 

Tape length 

30 m

50 m

100 m

150 m

100 ft

300 ft

Graduation 

1 mm 

1 mm 

1 mm 

1 mm 

0.01 ft

0.01 ft

PVC COLLAR TAPE GUIDE 

Model No.

Required pipe diam.

     

10-1131001072 

33 mm 

 

 

     

20-11312067

48 mm 

 

 

     

20-1131002065  

70 mm 

 

 

     

20-1131002064 

85 mm

 

 

     

PUSH-IN LEAF SPRING ANCHOR 

Model No. 

Min. bore diameter

O.D.  Anchor ext.

Pipe  diameter

     

FR-1131A50400 

76 mm 

140 mm 

33 mm

     

FR-1131A50400C 

101 mm 

152 mm 

48 mm

     

FR-1131A50400A 

127 mm 

254 mm 

70 mm

     

FR-1131A50400B 

152 mm 

254 mm 

85 mm

     

LEAF SPRING ANCHOR  

Model No. 

Min. bore diameter

O.D.  Anchor ext.

Pipe  diameter

     

FR-1131A50100 

76 mm 

222 mm

33 mm

     

FR-1131A50100C

101 mm 

254 mm

48 mm

     

FR-1131A50100A 

127 mm

279 mm

70 mm

     

FR-1131A50100B 

152 mm

305 mm

85 mm

     

MAGNETIC PLATE ANCHOR 

Model No.

Pipe diameter

     

FR-1131A50200

33 mm 

     

FR-1131A50200C 

48 mm

     

FR-1131A50200A 

70 mm

     

FR-1131A50200B

85 mm

     

MAGNETIC DATUM RING ANCHOR 

Model No. 

Pipe diameter

     

FR-1131A50300

33 mm

     

FR-1131A50300C

48 mm

     

FR-1131A50300A 

70 mm

     

FR-1131A50300B 

85 mm 

     

ACCESS PIPE 

Model No.

Length 

O.D.

     

99-PLAST100CSG8005 

1.5 or 3 m 

33 mm

 

     

99-PLAST150CSG8005 

1.5 or 3 m 

48 mm

     

TELESCOPING ACCESS PIPE 

Model No. 

O.D.

I.D. 

Length

     

20-1131002004 

33 mm 

24 mm 

1.5, 2.0 or 3.0 m

     

20-1131002059 

48 mm 

38 mm 

1.5, 2.0 or 3.0 m

     

TELESCOPING COUPLING  

Model No.

O.D. 

Total Range

 

     

20-1131002043 

42 mm 

152 mm 

 

     

20-1131002060 

57 mm 

152 mm 

 

     

INSTALLATION JIG FOR TELESCOPING ACCESS PIPE 

Model No.

O.D.

 

 

     

40-1131042900 

33 mm

 

 

     

40-1131043000

48 mm

 

 

     

END CAP

Model 

Pipe diameter

     

05-35019 

33 mm

 

 

     

05-35021

48 mm

 

 

     
ORDERING INFO

Please specify:

  • Borehole diameter and depth
  • Access pipe model number and length (For more information about 70 and 85 mm O.D. access pipe, please refer to standard inclinometer casing data sheets)      
  • Telescoping or standard couplings
  • Anchor model number
  • Readout instrument

 Optional accessories:

  • Probe centralizer
  • Plate dimensions available: STD: 203 × 203 mm; OPT: 305 × 305 mm or 610 × 610 mm
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