Difference Between Bonded and Unbonded Strain Gauge

Bonded Type Strain Gauges Unbonded Type Strain Gauges
The four wires are attached between the moving frame and fixed frame. Therefore, the wires are unbonded. All the grid-material of wire mesh is embedded in the epoxy thin papers. Therefore, the wires are bonded.
Damage to the wires may take place due to abrupt use, while working. No any damage to the “Wire Grid Material” during working.
Less life. More life.
Cannot be easily applied onto the member under test. Can be easily applied onto the member under test.
Bulky and heavy weight. Very light weight.

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