KFP Foil Strain Gages for Plastics

These strain gages are suitable for measuring strain in plastic materials such as acrylic resin. They conform to a linear expansion coefficient of 65×10⁻⁶/°C. *When attaching these gages to a hard-to-bond material such as polyethylene with CC-33A, S-9B surface treatment agent must also be applied.

Description

Major Properties
Materials Resistive element CuNi alloy foil
Materials Base Polyimide
Operating temperature in combination with major adhesives after curing (°C) CC-33A: -20 to 80ºC
CC-36: -20 to 80ºC
EP-34B: -20 to 80ºC
Operating temperature in combination with major leadwire cables (°C) Polyester-coated copper wire: -20 to 80ºC
Vinyl-coated flat cable (L-6, L-7): -10 to 80ºC
Self-temperature-compensation (°C) 10 to 80ºC
Applicable linear expansion coefficients (×10-6/℃) 65.0
Strain limits at normal temp. (approx. %) 3.0
Fatigue lives at normal temp. (times) 1.0×106 (±1500 μm/m)
Types, lengths and codes of lead-wire cables pre-attached to KFP
Model 2 polyester-coated copper wires 3 polyester-coated copper wires Vinyl-coated flat 2-wire cables Vinyl-coated flat 3-wire cables
Gage Pattern C1
15 cm N15C2 N15C3 L15C2R L15C3R
30 cm N30C2 N30C3 L30C2R L30C3R
1 m N1M2 N1M3 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.
KFP-5-120-C1-65 with 3 polyester-coated copper wires 10 cm long pre-attached
→ KFP-5-120-C1-65 N10C3

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