KFWB Series
Waterproof Foil Strain Gages

  • RoHS

KFWB

Summary

The surface of the KFWB series foil strain gage is covered with a special waterproof resin.
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 an 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)

Relative images

kfwb

Contents

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

E.g.
For the gage with a vinyl-coated flat 2-wire cable 2 m long
→ KFWB-5-120-C1-11 L2M2R

For the gage with a vinyl-coated flat 3-wire cable 5 m long
→ KFWB-5-120-D17-11 L5M3S

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

Products table

All display

KFWB 120Ω Uniaxial

KFWB
  • RoHS

10 gages/pkg

Model Dimensions (mm)
Gage(Grid) Base
Length Width Length Width
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
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 350Ω Uniaxial

KFWB
  • RoHS

10 gages/pkg

Model Dimensions (mm)
Gage(Grid) Base
Length Width Length Width
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
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 120Ω Biaxial, 0°/90°stacked rosette

KFWB
  • RoHS

5 gages/pkg

Model Dimensions (mm)
Gage(Grid) Base
Length Width Length Width
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
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 350Ω Biaxial, 0°/90°stacked rosette

KFWB
  • RoHS

5 gages/pkg

Model Dimensions (mm)
Gage(Grid) Base
Length Width Length Width
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
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 120Ω Triaxial, 0°/90°/45°stacked rosette

KFWB
  • RoHS

5 gages/pkg

Model Dimensions (mm)
Gage(Grid) Base
Length Width Length Width
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
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 350Ω Triaxial, 0°/90°/45°stacked rosette

KFWB
  • RoHS

5 gages/pkg

Model Dimensions (mm)
Gage(Grid) Base
Length Width Length Width
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
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

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Remarks

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

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