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High-elongation Foil Strain Gages

Strain Gages

High-elongation Foil Strain Gages

Overview

Technical Information

High-elongation Foil Strain Gages

Developed to measure strain from elastic to plastic region on structures, the KFEL series foil gages allow the strain to be measured as large as 10% to 15% with simple tension strain.

Technical Information

Major Properties
Materials Resistive element	CuNi alloy foil
Materials Base	Polyimide
Operating temperature in combination with major adhesives after curing (°C)	CC-36: -10 to 80ºC
Operating temperature in combination with major leadwire cables (°C)	Polyester-coated copper wire: -10 to 80ºC Vinyl-coated flat cable (L-6, L-7): -10 to 80ºC
Self-temperature-compensation (°C)	-
Applicable linear expansion coefficients (×10^-6/℃)	-
Strain limits at normal temp. (approx. %)	15
Fatigue lives at normal temp. (times)	1x10^6 (±1500μm/m)

Contents

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

KFEL-5-120-C1 with a vinyl-coated flat 2-wire cable 10 m long pre-attached
→ KFEL-5-120-C1 L10M2R

KFEL-5-120-D35 with a vinyl-coated flat 3-wire cable 5 m long pre-attached
→ KFEL-5-120-D35 L5M3S

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

Remarks

Besides the usual surface treatment with sandpaper, the gage bonding surface should be treated with the surface treatment agent S-9B if the gage is bonded to non-adhesive plastics such as polyethylene and polypropylene.

Then, bond the gage using the adhesive CC-36.

For S-9B and bonding conditions for other special materials, contact us.