Strain Gauges

Strain gauges are resistive sensing elements that convert mechanical deformation into a small change in electrical resistance, which a bridge circuit or signal conditioner then turns into a usable measurement. The category is broader than many buyers expect: it covers foil gauges on polyimide or other carriers, semiconductor strain gauges for higher sensitivity, weldable and bolt-on types for structural monitoring, plus accessories like adhesives, terminal pads, and leadwire. In practice, most engineers are matching gauge pattern, grid length, resistance, and gauge factor to the material under test and the strain level they expect to see. For stress analysis, fatigue testing, load cells, pressure sensing, and aerospace or civil structural health monitoring, the details matter more than the headline price. When sourcing strain gauges, buyers usually start with the basics: nominal resistance, gauge factor tolerance, grid dimensions, and whether the part is supplied as a single gauge, a rosette, or a matched set for bridge completion. Temperature performance is often the real decider, because apparent strain from thermal expansion can swamp a small measurement if the gauge alloy and substrate are not a good match for the test article. Adhesive choice and installation method drive accuracy as much as the sensor itself, so many teams prefer known manufacturers and consistent packaging over the lowest-cost option, especially when a failed bond means rework on a fixture that is already instrumented. Lead time can be a trade-off too; common 120 ohm and 350 ohm foil gauges are often available, while special patterns, high-temperature versions, or semiconductor types may need longer planning. Counterfeit risk is lower than in high-volume semiconductors, but inconsistent lots and unbranded repackaged parts still show up, which is why traceability and date code clarity are worth asking about. If you already have a part number or a target spec, you can check current availability and request pricing directly at icxing.com.