Weldable Strain Gauge

Weldable strain gauges are suitable for surface mounting installations. These are designed to measure strain in steel structures like tunnel lining, bridges, piles, struts, pressure shafts, etc.

Encardio-rite offers 2 types of weldable strain gauges

1.     Arc weldable strain gauges

Arc weldable strain gauges is normally installed on a steel structure by conventional arc welding. However, it also can be used to monitor strain changes on concrete or rock surfaces using anchors grouted into boreholes. These are available in two options

• Model EDS-20-AW with 3000 micro strain range
  
  The Encardio-rite model EDS-20V-AW strain gauges are intended primarily for long-term strain measurement and are suitable for surface mounting by welding on steel structures such as bridges, piles, wye sections, pressure shafts, tunnel linings, and supports, etc. 
  
  
• Model EDS-21-AW with 000 micro strain range
  
  Model EDS-21V-AW is designed to measure strain in steel or on the concrete surface of the composite structure. It is suitable for surface mounting by welding on steel structures such as bridges, piles, wye sections, pressure shafts, tunnel linings and supports, etc.
  

2.     Spot weldable strain gauges

Strain Gauges can be spot welded or epoxy bonded on steel structures and struts. It can also be epoxy bonded on concrete structures. A sensor coil housing mounted directly over the strain gage, completely encloses the sensor, forming a watertight enclosure. A pair of clamps are provided to aid in fixing the housing to the substrate using an epoxy adhesive.

It is mostly installed by spot welding on a steel structure such as a bridge, pile, tunnel lining and support etc. It can also be used by epoxy bonding on a steel structure, concrete or rock surface.

Arc weldable strain gauge is much more robust than the spot weldable strain gauge, has a gauge wire length of 150 mm and provides better averaging of the strain value in the structure. The spot weldable strain gauge has a gauge wire length of 50.8 mm and is generally used where there are space restrictions.