All extensometers in this catalog are very high
accuracy, with performance significantly better
than required by various standards organizations.
For ASTM E83, all will meet class B-1, except
for the longer travel versions of our Model
3540 Deflection Gages. For ISO 9513, Epsilon’s
extensometers meet class 0,5. Many extensometers
regularly achieve a linearity better than 0.1%
when calibrated at the factory.
All units ship with a certificate of accuracy,
traceable to NIST. Each is individually calibrated,
with relevant data provided.