KFRS Series
Foil Strain Gages for Printed Boards

kfrs

Summary

PCB are used for varieties of products including mobile phones, car navigation systems and digital cameras. To evaluate the mechanical and thermal characteristics of these PCB, the KFRS gages were developed by integrating the advantageous features of KFG and KFR gages.

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 ofPCB

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 cable: -196 to 150ºC
Vinyl-coated flat cable (L-6, L-7): -10 to 80ºC
Middle-temperature cable (L-11, L-12): -100 to 150ºC
Self-temperature-compensation (°C) -30 to 120ºC
Applicable linear expansion coefficients (×10-6/℃) 13.0
Strain limits at normal temp. (approx. %) 1.6
Fatigue lives at normal temp. (times) 2x106 (±1500μm/m)

Contents

Besides the silver-clad copper lead wire, KFRS strain gages with pre-attached lead cables are available on request.
When ordering, please suffix the lead-wire cable code to the model number with a space in between.

e.g.
KFRS-02-120-C1-13 suffixes N10C3 for the gage with a 10 cm long polyester-coated copper 3-wire cable becomes
KFRS-02-120-C1-13 N10C3

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

Products table

All display

KFRS120Ω Uniaxial

KFRS

Model Dimensions (mm)
Gage(Grid) Base
Length Width Length Width
KFRS-1-120-C1-13 1 0.7 4 1.4
KFRS-02-120-C1-13 0.2 0.8 1.2 1.1

KFRS120Ω Biaxial, 0°/90°

KFRS-120-D34

Model Dimensions (mm)
Gage(Grid) Base
Length Width Length Width
KFRS-02-120-D34-13 0.2 0.8 2.5 2.5

KFRS120Ω Triaxial, 0°/45°/90°

KFRS-120-D35

Model Dimensions (mm)
Gage(Grid) Base
Length Width Length Width
KFRS-02-120-D35-13 0.2 0.5 2.5 2.5

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