Laser extensometer
Model 500L
Tinius Olsen
The Tinius Olsen model 500L non-contacting extensometer is designed to measure the extension of medium to high elongation materials, typically elastomers. Since there is no contact of this extensometer with the sample, the 500L is ideal for also measuring the elongation of fragile samples where such contact cold 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 which 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°C to 300°C.
Preparation of the test specimen is quick and easy. A punch is supplied to cut narrow strips of adhesive reflective tape. The gauge length is defined by attaching these two reflective strips to the sample. Any gauge length can be used and this is accurately measured by the laser at the start of the test.
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