KFRS Series
Foil Strain Gages for Printed Boards

Summary
PCB are used for varieties of products including cellular phones, car navigation systems and digital cameras.
The gages are the self-temperature-compensation gages (SELCOM gages) for evaluating them.
Click here for the [Typical Strain Gage Bonding Procedure]
Click here for the [Strain Gages with Pre-attached Lead Cables]
Features
∙ Dimensions of gage base (bondable space to mounted components and narrow parts)
1.2 mm long by 1.1 mm wide (uniaxial), 2.5 mm long by 2.5 mm wide (biaxial or triaxial)
∙ Linear expansion coefficient of 13 x 10-6/ºC, suitable for component-mounted board
∙ Self-temperature-compensation range is made as wide as –30 to 120ºC to satisfy thermal cyclic tests of PCB.
Major Properties
Materials Resistive element | NiCr alloy foil |
---|---|
Materials Base | Polyimide |
Operating temperature in combination with major adhesives after curing (°C) | CC-33A: -196 to 120ºC CC-36: -30 to 100ºC PC-600: -196 to 150ºC |
Operating temperature in combination with major leadwire cables (°C) | Polyester-coated copper wire: -196 to 150ºC Vinyl-coated flat cable (L-6, L-7): -10 to 80ºC Mid-temperature cable (L-11, L-12): -100 to 150ºC |
Self-temperature-compensation (°C) | -30 to 120ºC |
Applicable linear expansion coefficients (×10-6/℃) | 13 |
Strain limits at normal temp. (approx. %) | 1.6 |
Fatigue lives at normal temp. (times) | 2x106 (±1500μm/m) |
Relative images

Contents
When ordering, suffix the lead-wire cable code to the model number with a space in between.
E.g.
For the gage with 3 polyester-coated copper wires 10-cm long pre-attached
→ KFRS-02-120-C1-13 N10C3
For the gage with a vinyl-coated flat 3-wire cable 5 m long pre-attached
→ KFRS-05-120-D35-13 L5M3S
For details, please refer to the [Strain Gages with Pre-attached Lead Cables]
Products table
All display
KFRS 120Ω Uniaxial

10 gages/pkg
Model | Dimensions (mm) | |||
---|---|---|---|---|
Gage(Grid) | Base | |||
Length | Width | Length | Width | |
KFRS-1-120-C1-13 | 1 | 0.65 | 4 | 1.4 |
KFRS-02-120-C1-13 | 0.2 | 0.8 | 1.2 | 1.1 |
KFRS 120Ω Biaxial, 0°/90°

5 gages/pkg
Model | Dimensions (mm) | |||
---|---|---|---|---|
Gage(Grid) | Base | |||
Length | Width | Length | Width | |
KFRS-02-120-D34-13 | 0.2 | 0.8 | 2.5 | 2.5 |
KFRS 120Ω Triaxial, 0°/90°/45° plane arrangement

5 gages/pkg
Model | Dimensions (mm) | |||
---|---|---|---|---|
Gage(Grid) | Base | |||
Length | Width | Length | Width | |
KFRS-02-120-D35-13 | 0.2 | 0.8 | 2.5 | 2.5 |