Spot weldable Strain Gauges



Designed to steel structures in:

  • Tunnels
  • Excavation bracing
  • Piles

Bridges Standard unit has a 150mm gauge length, a 3000µε range The gauge is adaptable for bonding to concrete or bolting to steel surfaces via the end mounting blocks.

Operating Principle:

Steel wire length is tensioned between two mounting blocks that are arc welded to the surface of a structural steel member. Deformation of the structure under load produces relative movement between the two mounting blocks causing a change in wire tension and a corresponding change in its frequency of vibration. Using standard vibrating wire principles easily read by loggers or readout.


  • Robust user-friendly design
  • Long term stability
  • High water resistance
  • Read over long cable lengths
  • Read with standard vibrating wire loggers and readouts.
  • Removable coil so easy replacement if cable is damaged

Automatic temperature compensation via hermetically sealed thermistor.


  • Standard Range: 3000ε
  • Resolution: 0.4ε
  • Accuracy: ±0.5% F.S.
  • Nonlinearity: <0.5% F.S.
  • Temperature Range: -20 to +80
  • Active Length: 51mm