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
· Model EDS-21-AW with 000 micro strain range
2. Spot weldable strain gauges
Model EDS-20V-SW spot weldable strain gauge is mostly installed by spot welding on a steel structures 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.