KFEM Ultrahigh-elongation Foil Strain Gages

These foil type large-elongation strain gages are for measuring strain from the structural elastic region to the plastic region of various structures. They are capable of measuring from approximately 20 to 30% material deformation in simple tensile strain.

Description

Major Properties
Materials Resistive element CuNi alloy foil
Materials Base Polyimide
Operating temperature in combination with major adhesives after curing (°C) CC-36: -20 to 80°C
Operating temperature in combination with major leadwire cables (°C) Polyester-coated copper wire: -20 to 80°C
Vinyl-coated flat cable (L-6, L-7): -10 to 80°C
Self-temperature-compensation (°C)
Applicable linear expansion coefficients (×10-6/℃)
Strain limits at normal temp. (approx. %) 20 to 30
Fatigue lives at normal temp. (times)
Remarks

*Strain limit of 20% to 30% is ensured for simple tension applied to the gage bonded on stainless steel SUS 304 or aluminum alloy A1050 at normal temperature.

*Strain limit will be decreased under the following conditions.

  • In case of bonding to non-adhesive materials such as aluminum alloy A7075 and plastics Polypropylene.
  • In case of the targets have discontinuous distortion, or any crack on its surface.
  • In case of measurement at high/low temperature.
Types, lengths and codes of lead-wire cables pre-attached to KFEM
Model 2 polyester-coated copper wires Vinyl-coated flat 2-wire cables Vinyl-coated flat 3-wire cables
Gage Pattern C1
15 cm N15C2 L15C2R L15C3R
30 cm N30C2 L30C2R L30C3R
1 m N1M2 L1M2R L1M3R
3 m L3M2R L3M3R
5 m L5M2R L5M3R
Operating Temperature -20 to 80°C -10 to 80°C
Remarks Twisted for ≥ 50 cm L-6, L-9 for ≥ 6 m L-7, L-10 for ≥ 6 m

*For other lead-wire cable lengths, contact us.

How to order

When ordering, suffix the lead-wire cable code to the model number with a space in between.

E.g.
KFEM-5-120-C1 with a vinyl-coated flat 2-wire cable 10 m long pre-attached
→ KFEM-5-120-C1 L10M2R

If no lead-wire cable code is suffixed, the gage is delivered with gage leads only.
(Silver-covered copper wires 25 mm long)