W-E440 High-Temperature Series extensometers are ideally suited for testing materials such as advanced composites, metals and polymers at elevated temperatures. They incorporate a capacitive sensor that does not require any cooling. The extensometers are supplied with a special sensor conditioner unit providing a 0-10 V output with exceptionally
These extensometers can be attached to round and
flat specimens to perform tensile, compression and cyclic tests.
Principle of Operation
The specimen displacement is measured using a capacitive sensor rather than strain gauges. This provides the extensometer with the ability to withstand high temperatures without any active cooling. The dual-flexure design makes these units very durable and they may be left on the specimen through specimen failure. The extensometers are easy to mount and feature integral springs that hold the unit on the
The freestanding sensor conditioner produces a
0-10 V output that is connected to the strain channel of the testing system. The output signal is characterized by having exceptionally low noise (typically 0.1 mV
at 10 V).