KFWB Series
Waterproof Foil Strain Gages

  • RoHS

KFWB

Summary

The KFWB seres foil strain gages have the surface covered with a special resin for waterproofing. The waterproof structure enables these gages to serve for outdoor or underwater measurement merely by being bonded to measuring objects. The insulation resistance shows virtually no deterioration even after 100 hours of use under underwater pressure of approximately 10 MPa. In addition, the covering resin is flexible enough to enable easy bonding to curved surfaces.

Click here for the [Strain Gages with Pre-attached Lead Cables]

Major Properties

Materials Resistive element CuNi alloy foil
Materials Base Polyimide
Operating temperature in combination with major adhesives after curing (°C) CC-33A: -10 to 80ºC
CC-36: -10 to 80ºC
EP-340: -10 to 80ºC
Operating temperature in combination with major leadwire cables (°C) Vinyl-coated flat cable (L-6, L-7): -10 to 80ºC
Self-temperature-compensation (°C) 10 to 80ºC
Applicable linear expansion coefficients (×10-6/℃) 11, 16, 23
Strain limits at normal temp. (approx. %) 2.8
Fatigue lives at normal temp. (times) 3x104 (±1500μm/m)

Contents

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

e.g.
KFWB-5-120-C1-11 suffixes L2M2R for the gage with a 2 m long vinyl-coated flat 2-wire cable becomes
KFWB-5-120-C1-11 L2M2R

For details, please refer to the [Strain Gages with Pre-attached Lead Cables]

Products table

All display

KFWB120Ω Uniaxial

KFWB
    • RoHS

Model Dimensions (mm)
Gage(Grid) Base
Length Width Length Width
KFWB-2-120-C1-11 2 1.2 30 12
KFWB-2-120-C1-16 2 1.2 30 12
KFWB-2-120-C1-23 2 1.2 30 12
KFWB-5-120-C1-11 5 1.4 30 12
KFWB-5-120-C1-16 5 1.4 30 12
KFWB-5-120-C1-23 5 1.4 30 12

KFWB350Ω Uniaxial

KFWB
    • RoHS

Model Dimensions (mm)
Gage(Grid) Base
Length Width Length Width
KFWB-2-350-C1-11 2 2 30 12
KFWB-2-350-C1-16 2 2 30 12
KFWB-2-350-C1-23 2 2 30 12
KFWB-5-350-C1-11 5 2 30 12
KFWB-5-350-C1-16 5 2 30 12
KFWB-5-350-C1-23 5 2 30 12

KFWB120Ω Biaxial, 0°/90°stacked rosette

KFWB
    • RoHS

Model Dimensions (mm)
Gage(Grid) Base
Length Width Length Width
KFWB-2-120-D16-11 2 1.2 21 18
KFWB-2-120-D16-16 2 1.2 21 18
KFWB-2-120-D16-23 2 1.2 21 18
KFWB-5-120-D16-11 5 1.4 21 18
KFWB-5-120-D16-16 5 1.4 21 18
KFWB-5-120-D16-23 5 1.4 21 18

KFWB350Ω Biaxial, 0°/90°stacked rosette

KFWB
    • RoHS

Model Dimensions (mm)
Gage(Grid) Base
Length Width Length Width
KFWB-2-350-D16-11 2 2 21 18
KFWB-2-350-D16-16 2 2 21 18
KFWB-2-350-D16-23 2 2 21 18
KFWB-5-350-D16-11 5 2 21 18
KFWB-5-350-D16-16 5 2 21 18
KFWB-5-350-D16-23 5 2 21 18

KFWB120Ω Triaxial, 0°/45°/90°stacked rosette

KFWB
    • RoHS

Model Dimensions (mm)
Gage(Grid) Base
Length Width Length Width
KFWB-2-120-D17-11 2 1.2 21 18
KFWB-2-120-D17-16 2 1.2 21 18
KFWB-2-120-D17-23 2 1.2 21 18
KFWB-5-120-D17-11 5 1.4 21 18
KFWB-5-120-D17-16 5 1.4 21 18
KFWB-5-120-D17-23 5 1.4 21 18

KFWB350Ω Triaxial, 0°/45°/90°stacked rosette

KFWB
    • RoHS

Model Dimensions (mm)
Gage(Grid) Base
Length Width Length Width
KFWB-2-350-D17-11 2 2 21 18
KFWB-2-350-D17-16 2 2 21 18
KFWB-2-350-D17-23 2 2 21 18
KFWB-5-350-D17-11 5 2 21 18
KFWB-5-350-D17-16 5 2 21 18
KFWB-5-350-D17-23 5 2 21 18

Page Top

To Ensure Safe Usage

Notes on pre-attached lead-wire cables
∙ Standard color of the 2-wire cable pre-attached to uniaxial gages is red (R). If desired, a white, green, yellow or black cable can be pre-attached.
∙ Standard 3-wire cable pre-attached to uniaxial gages has red stripes (R). If desired, the red stripes can be changed to blue or yellow stripes.
∙ In the case of a biaxial gage, 2-wire cables are color-coded wth red and white stripes for 0º and 90º, respectively and 3-wire cables, with red and yellow stripes for 0º and 90º, respectively.
∙ In the case of a triaxial gage, 2-wire cables are color-coded wth red, white and green stripes for 0ºand 90º and 45º, respectively and 3-wire cables, with red, yellow and blue stripes for 0ºand 90º and 45º, respectively.

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