TEN-TFS5/120-W - Film extensometer with leads, 120Ohm

The film wire strain gauges are based on the effect of dependance of resistance variation on sensing element deformation.
The linear character (within restricted range of deformation) of this dependancy enables to use wire strain gauges to determine deformations as well as forces (strains) and moments operating on elements being under test.
Supporting film data:
- material: modified epoxy-phenol resin
- thickness: 30 µm
- insulation resistance: over 100 MOhm
- dielectric strength: over 1 kV
Resistance network of strain gauge:
- material: constantan CuNi 44
- temperature coefficient of resistance: 0,04 x 10-3/°C
- thickness: 5 µm
Strain gauges:
- thickness: 60 µm
- operating temperature max.: 200°C
- deformation max.: 5%
- coefficient of deformation sensitivity "k"
(strain gauge constant): 2,15
- tolerance of the coefficient of deformation sensitivity: 0,5%
The resistance network of strain gauge is placed between two layers of supportingfilm, which has insulating properties.
The coefficient of deformation sensitivity "k" is a measure of relative straingauge resistance variation versus relative deformation.