The Tinius Olsen model 500LC non-contacting extensometer is designed to measure the extension of medium to high elongation materials, typically elastomers. Since there is no contact between the extensometer and the sample, the 500LC is also ideal for measuring the elongation of fragile samples where such contact could induce a premature sample break.

The model 500LC uses a low power helium neon laser with precision optical components and a dedicated 16-bit processor. The laser projects a visible red scanning beam that is directed at two reflective targets attached to the specimen.

An additional benefit of using laser technology is its ability to scan the test specimen through the glass viewing window of an environmental test chamber. Elongation characteristics can then be evaluated from –70-300°C.