small strain gauge

We regularly produce gauges with grid lengths around 3–5 mm. For special applications, smaller sizes can be explored, but they’re more sensitive to handling and installation. It’s best to discuss the minimum possible size with our application engineers based on the material and expected strain levels.

Yes, but the gauge must be sealed properly. We offer options with a factory-applied moisture barrier or supply gauges with a polyimide backing and recommend coating compounds for field sealing. For embedment in concrete, we often encapsulate the gauge in a small metal or plastic housing to protect it from alkaline water and mechanical damage during casting.

Accuracy depends more on the installation and conditioning electronics than on the gauge size itself. A well-installed small gauge can deliver the same accuracy as a larger one within its strain range. The main trade-off is that smaller grids have lower heat dissipation, so the excitation current may need to be reduced to avoid self-heating errors.

We can attach lead wires in various lengths, typically with PVC, Teflon, or silicone insulation depending on temperature and chemical exposure. Stranded conductors help with fatigue life if the wire must flex. We also keep wire diameter small to minimize intrusion in narrow spaces.

Give us the target strain range, test material, operating temperature, and any dimensional constraints. A sketch or drawing of the installation surface is helpful. We’ll then propose a gauge layout, backing, and connection details. Most customizations don’t involve tooling charges unless an entirely new foil pattern is needed, and even then, the cost is often modest for small quantities.