KFRPB Series
Foil Strain Gages for Composite Materials
Summary
The KFRPB series foil strain gages are self-temperature-compensation gages (SELCOM gages) suitable for strain measurement of composite materials such as CFRP and GFRP.
The special gage pattern minimizes the effect of self-heating due to gage current and the effect of reinforcement of low-elasticity materials.
To ensure accurate measurement by avoiding the self-heating effect of gage current, consider the following:
1. Select a lower excitation voltage on a measuring instrument.
2. Active-dummy system
3. 350Ω strain gages
Click here for the [Strain Gages with Pre-attached Lead Cables]
Major Properties
| Materials Resistive element | NiCr alloy foil |
|---|---|
| Materials Base | Polyimide |
| Operating temperature in combination with major adhesives after curing (°C) | EP-34B: -55 to 200ºC CC-33A: -196 to 120ºC |
| Operating temperature in combination with major leadwire cables (°C) | Polyester-coated copper wire: -196 to 150ºC Vinyl-coated flat cable (L-6, L-7, L-9, L-10): -10 to 80ºC Mid-temperature cable (L-11, L-12): -100 to 150ºC Fluoroplastic-coated high/low-temp. 3-wire cable (L-3): -196 to 200ºC |
| Self-temperature-compensation (°C) | 0 to 150ºC |
| Applicable linear expansion coefficients (×10-6/℃) | 1, 3, 6, 9 |
| Strain limits at normal temp. (approx. %) | 2.2 |
| Fatigue lives at normal temp. (times) | 1x106 (±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 2 polyester-coated copper wires 15 cm long
→ KFRPB-5-120-C1-1 N15C2
For the gage with a vinyl-coated flat 3-wire cable 5 m long pre-attached
→ KFRPB-5-120-D22-3 L5M3S
If no lead-wire cable code is suffixed, the gage is delivered with gage leads only.
(Silver-covered copper wires 25 mm long)
For details, please refer to the [Strain Gages with Pre-attached Lead Cables]
Products table
All display
KFRPB 120Ω Uniaxial
10 gages/pkg
| Model | Dimensions (mm) | |||
|---|---|---|---|---|
| Gage(Grid) | Base | |||
| Length | Width | Length | Width | |
| KFRPB-5-120-C1-1 | 5 | 1.4 | 15 | 5 |
| KFRPB-5-120-C1-3 | 5 | 1.4 | 15 | 5 |
| KFRPB-5-120-C1-6 | 5 | 1.4 | 15 | 5 |
| KFRPB-5-120-C1-9 | 5 | 1.4 | 15 | 5 |
| KFRPB-2-120-C1-1 | 2 | 1.2 | 10 | 5 |
| KFRPB-2-120-C1-3 | 2 | 1.2 | 10 | 5 |
| KFRPB-2-120-C1-6 | 2 | 1.2 | 10 | 5 |
| KFRPB-2-120-C1-9 | 2 | 1.2 | 10 | 5 |
KFRPB 350Ω Uniaxial
10 gages/pkg
| Model | Dimensions (mm) | |||
|---|---|---|---|---|
| Gage(Grid) | Base | |||
| Length | Width | Length | Width | |
| KFRPB-5-350-C1-1 | 5 | 1.5 | 15 | 5 |
| KFRPB-5-350-C1-3 | 5 | 1.5 | 15 | 5 |
| KFRPB-5-350-C1-6 | 5 | 1.5 | 15 | 5 |
| KFRPB-5-350-C1-9 | 5 | 1.5 | 15 | 5 |
| KFRPB-2-350-C1-1 | 2 | 2.2 | 10 | 5 |
| KFRPB-2-350-C1-3 | 2 | 2.2 | 10 | 5 |
| KFRPB-2-350-C1-6 | 2 | 2.2 | 10 | 5 |
| KFRPB-2-350-C1-9 | 2 | 2.2 | 10 | 5 |
KFRPB 120Ω Triaxial, 0°/90°/45° plane arrangement
10 gages/pkg
| Model | Dimensions (mm) | |||
|---|---|---|---|---|
| Gage(Grid) | Base | |||
| Length | Width | Length | Width | |
| KFRPB-5-120-D22-1 | 5 | 1.4 | 19 | 19 |
| KFRPB-5-120-D22-3 | 5 | 1.4 | 19 | 19 |
| KFRPB-5-120-D22-6 | 5 | 1.4 | 19 | 19 |
| KFRPB-5-120-D22-9 | 5 | 1.4 | 19 | 19 |
| KFRPB-2-120-D22-1 | 2 | 1.2 | 15 | 15 |
| KFRPB-2-120-D22-3 | 2 | 1.2 | 15 | 15 |
| KFRPB-2-120-D22-6 | 2 | 1.2 | 15 | 15 |
| KFRPB-2-120-D22-9 | 2 | 1.2 | 15 | 15 |
KFRPB 350Ω Triaxial, 0°/90°/45° plane arrangement
10 gages/pkg
| Model | Dimensions (mm) | |||
|---|---|---|---|---|
| Gage(Grid) | Base | |||
| Length | Width | Length | Width | |
| KFRPB-5-350-D22-1 | 5 | 1.5 | 19 | 19 |
| KFRPB-5-350-D22-3 | 5 | 1.5 | 19 | 19 |
| KFRPB-5-350-D22-6 | 5 | 1.5 | 19 | 19 |
| KFRPB-5-350-D22-9 | 5 | 1.5 | 19 | 19 |
| KFRPB-2-350-D22-1 | 2 | 2.2 | 15 | 15 |
| KFRPB-2-350-D22-3 | 2 | 2.2 | 15 | 15 |
| KFRPB-2-350-D22-6 | 2 | 2.2 | 15 | 15 |
| KFRPB-2-350-D22-9 | 2 | 2.2 | 15 | 15 |
