Vibrating Wire Stressmeter

Description

The Model 3100 Vibrating Wire Stressmeter is a rigid inclusion cell suitable for monitoring uniaxial stress changes in hard and soft rock applications. The stainless steel proving ring is wedged inside the borehole using either percussive lever screw or hydraulic setting tools. The cells are capable of measuring up to 70MPa. A sensitive, low range model is available for coal Applications. Available in EX (37mm to 39mm), BX (58mm to 61mm) and NX (74mm to 77mm) boreholes sizes.

Application

For stress change monitoring in:

• Underground mines
• Tunnels
• Support pillars
• Deep excavations
• Shafts

Features

• Corrosion resistant
• Waterproof
• Long-term stability
• Suitable for remote readout
• Rugged construction
• Fitted with thermistor
• Not affected by long cable lengths
• Able to be connected to datalogging systems

Specifications

• Compression range: 0-70 MPa
• Tension range: 0-5 MPa
• Operating temperature: -20 to +60C
• Borehole diameter: 37-77 mm
• Maximum borehole depth: 30 m
• Dimension: 41 mm x 28 mm long
• Weight: 0.25 kg
• Dimension(EX): 29 mm x 44 mm long
• Dimension(BX): 48 mm x 70 mm long
• Dimension(NX): 64 mm x 76 mm long
• Weight(EX): 0.45 kg
• Weight(BX): 0.90 kg
• Weight(NX): 1.4 kg