OMEGA® KFH SERIES
PRE-WIRED STRAIN GAGES
Proven Omega
Quality Strain Gages
with Two or Three
Wires Attached
to Make
Installation Easy!
IN STOCK!
For Fast Delivery
Visit omega.com/kfh
U No Soldering at the Measuring Point
U Each Gage has 50 mm of PTFE Cable
before Transitioning to AWG 28 Leads
to Prevent Leads from Adhering
During Installation
U Short, Medium and Long Grid
Linear Gages
U Short and Medium Grid XY Gages
(T-Rosettes)
U Short and Medium Grid 0°/45°/90°
Planar Rosettes
U Rugged Polyimide Carrier
U Fully Encapsulated Gages for
Protection from the Environment
STRAIN GAGES
Fast
Delivery!
E
Strain gage
shown actual size.
E-1
PRE-WIRED STRAIN GAGES
PRECISION LINEAR PATTERN
KFH Series
2- or 3-Wire Models
120 or 350 Ω
0.6 to 20 mm Grid Lengths
U Pre-Wired for Fast
Installation
U No Soldering at
Measurement End
U Broad Temperature Range
U 2- or 3-Wire Models
U Clear Alignment Marks
U Bonds with Hot or Cold
Cure Adhesives
U PTFE Wire at Attachment
End Prevents Sticking
During Installation
Linear pattern precision gages with
minature and medium length grids
are for general purpose and stress
analysis applications. Available
with either two 1-meter leads or
three 3-meter leads and 120 or
350 Ω resistance. All models are
compensated for steel.
To Order Visit omega.com/kfh for Pricing and Details
NOM.
RESIS-
GAGE PATTERN
Leads not shown
Shown
larger than
actual size,
0.3 mm
Shown
0.6_120ZE LY41S-3_2012_09_19
1.5_120ZE LY41S-3_2012_09_19
Shown actual size, 3 mm
3_120ZE LY41S-3_2012_09_19
Shown actual size, 6 mm
6_120ZE LY41S-3_2012_09_19
Shown actual size, 10 mm
10_120ZE LY41S-3_2012_09_19
Shown actual size, 20 mm
20_120ZE LY41S-3_2012_09_19
larger than
actual size,
0.6 mm
Shown
larger than
actual size,
1.5 mm
MODEL NO.
Pkg of 10
0.3 mm GRID
KFH-03-120-C1-11L1M2R 120
KFH-03-120-C1-11L3M2R 120 1.5 ST Three 3 m leads
0.6 mm GRID
KFH-06-120-C1-11L1M2R 120
KFH-06-120-C1-11L3M3R 120 1.5 ST Three 3 m leads
1.5 mm GRID
KFH-1.5-120-C1-11L1M2R 120
KFH-1.5-120-C1-11L3M3R 120 2.5 ST Three 3 m leads
3 mm GRID
KFH-3-120-C1-11L1M2R 120
KFH-3-120-C1-11L3M3R 120 4 ST Three 3 m leads
KFH-3-350-C1-11L1M2R 350 9 ST Two 1 m leads
KFH-3-350-C1-11L3M3R 350 9 ST Three 3 m leads
6 mm GRID
KFH-6-120-C1-11L1M2R 120
KFH-6-120-C1-11L3M3S 120 8 ST Three 3 m leads
KFH-6-350-C1-11L1M2R 350 15 ST Two 1 m leads
KFH-6-350-C1-11L3M3R 350 15 ST Three 3 m leads
10 mm GRID
KFH-10-120-C1-11L1M2R 120
KFH-10-120-C1-11L3M3R 120 14 ST Three 3 m leads
20 mm GRID
KFH-20-120-C1-11L1M2R 120
KFH-20-120-C1-11L3M3R 120 7 ST Three 3 m leads
TANCE
(Ω)
DIMENSIONS mm (inch)
GRID CARRIER
A B C D
0.3
(0.012)
0.6
(0.024)
1.5
(0.059)
3.0
(0.118)
6.0
(0.24)
10
(0.39)
20
(0.79)
1.96
(0.077)
(0.043)
(0.059)
(0.079)
(0.079)
(0.12)
(0.12)
1.1
1.5
2.0
2.0
3.0
3.0
4.5
(0.18)
4.8
(0.19)
5.8
(0.23)
7.4
(0.29)
10.5
(0.41)
14.8
(0.58)
25.2
(0.99)
(0.15)
(0.15)
(0.15)
(0.15)
(0.15)
(0.19)
(0.19)
Strain gage
shown larger than
actual size.
MAX V*
(Vrms)
3.9
3.9
3.9
3.9
3.9
4.8
4.8
1.5 ST Two 1 m leads
1.5 ST Two 1 m leads
2.5 ST Two 1 m leads
4 ST Two 1 m leads
8 ST Two 1 m leads
14 ST Two 1 m leads
7 ST Two 1 m leads
TEMP
COMP
TERMINATION
AND
LEAD LENGTH
ACCESSORIES
MODEL NO. DESCRIPTION
TT300 Complete heat cure adhesive kit
SG496 1 oz methyl-based cyanoacrylate (approximately 750 gages)
SG401 0.1 oz ethyl-based cyanoacrylate (approximately 50 gages)
* Maximum permitted bridge energizing voltage (Vrms)
Ordering Examples: KFH-1.5-120-C1-11L1M2S, a linear 1.5 mm grid, 120 Ω, with two 1 m leads.
KFH-3-350-C1-11L3M3S, a linear 3 mm grid, 350 Ω, with three 3 m leads per grid.
E-2
PRE-WIRED STRAIN GAGES
PRECISION PLANAR X-Y PATTERN
D
B
KFH Series
2- or 3-Wire Models
120 or 350 Ω
0.6 to 6 mm Grid Lengths
U Pre-Wired for Fast
Installation
U No Soldering at
Measurement End
U Broad Temperature Range
U 2- or 3-Wire Models
U Clear Alignment Marks
U Bonds with Hot or Cold
Cure Adhesives
U PTFE Wire at Attachment
End Prevents Sticking
During Installation
The planar XY pattern allows
precision strain measurement by
eliminating the errors often
associated with a stacked XY
pattern. These gages are available
with either two 1-meter leads or
three 3-meter leads per grid and
are compensated for steel.
C
A
Dimensions Key:
GRID
A: Active gage length
B: Active gage width
CARRIER
C: Matrix length
D: Matrix width
To Order Visit omega.com/kfh for Pricing and Details
DIMENSIONS mm (inch)
GRID CARRIER
NOM.
RESIS-
GAGE PATTERN
Leads not shown
Shown
06_120ZE XY31S-3_2012_09_19 KFH-06-120-D16-11L1M2S 120
1.5_120ZE XY31S-3_2012_09_19 KFH-1.5-120-D16-11L1M2S 120
Shown actual size, 3 mm
3_120ZE XY31S-3_2012_09_19 KFH-3-120-D16-11L3M3S 120 5.5 ST Three 3 m leads
Shown actual size, 6 mm
6_120ZE XY31S-3_2012_09_19 KFH-6-120-D16-11L3M3S 120 11 ST Three 3 m leads
larger than
actual size,
0.6 mm
Shown
larger than
actual size,
1.5 mm
MODEL NO.
Pkg of 10
0.6 mm GRID
KFH-06-120-D16-11L3M3S 120 1.5 ST Three 3 m leads
1.5 mm GRID
KFH-1.5-120-D16-11L3M3S 120 3 ST Three 3 m leads
3 mm GRID
KFH-3-120-D16-11L1M2S 120
KFH-3-350-D16-11L1M2S 350 10 ST Two 1 m leads
KFH-3-350-D16-11L3M3S 350 10 ST Three 3 m leads
6 mm GRID
KFH-6-120-D16-11L1M2S 120
KFH-6-350-D16-11L1M2S 350 20 ST Two 1 m leads
KFH-6-350-D16-11L3M3S 350 20 ST Three 3 m leads
TANCE
(Ω)
A B C D
0.6
(0.024)
1.5
(0.059)
3.0
(0.12)
6.0
(0.24)
1.0
(0.039)
1.6
(0.063)
3.2
(0.13)
6.3
(0.25)
5.1
(0.20)
5.8
(0.23)
7.5
(0.30)
11
(0.43)
6.9
(0.27)
6.9
(0.27)
9.4
(0.37)
16
(0.63)
MAX V*
(VRMS)
TEMP
COMP
1.5 ST Two 1 m leads
3 ST Two 1 m leads
5.5 ST Two 1 m leads
11 ST Two 1 m leads
TERMINATION
AND
LEAD LENGTH
PER GRID
STRAIN GAGES
E
ACCESSORIES
MODEL NO. DESCRIPTION
TT300 Complete heat cure adhesive kit
SG496 1 oz methyl-based cyanoacrylate (approximately 750 gages)
SG401 0.1 oz ethyl-based cyanoacrylate (approximately 50 gages)
* Maximum permitted bridge energizing voltage (Vrms)
Ordering Examples: KFH-1.5-120-D16-11L1M2S, two 1.5 mm grids in a planar XY pattern, 120 Ω, with two 1 m leads per grid.
KFH-3-350-D16-11L3M3S, two 3 mm grids in a planar XY pattern, 350 Ω, with three 3 m leads per grid.
E-3
PRE-WIRED STRAIN GAGES
PLANAR 0°/45°/90° ROSETTE PATTERN
D
B
KFH Series
2- or 3-Wire Models
120 or 350 Ω
0.6 to 6 mm Grid Lengths
U Pre-Wired for Fast
Installation
U No Soldering at
Measurement End
U Broad Temperature Range
U 2- or 3-Wire Models
U Clear Alignment Marks
U Bonds with Hot or Cold
Cure Adhesives
U PTFE Wire at Attachment
End Prevents Sticking
During Installation
The planar rosette pattern allows
precision strain measurement
by eliminating the errors often
associated with a stacked pattern.
These gages are available with
either two 1-meter leads or three
3-meter leads per grid and are
compensated for steel.
C
A
Dimensions Key:
GRID
A: Active gage length
B: Active gage width
CARRIER
C: Matrix length
D: Matrix width
To Order Visit omega.com/kfh for Pricing and Details
DIMENSIONS mm (inch)
GRID CARRIER
NOM.
RESIS-
GAGE PATTERN
Leads not shown
Shown
06_120ZE RY81S-3_2012_09_19 KFH-06-120-D17-11L1M2S 120
1.5_120ZE RY81S-3_2012_09_19 KFH-1.5-120-D17-11L1M2S 120
Shown actual size, 3 mm
3_120ZE RY81S-3_2012_09_19 KFH-3-120-D17-11L3M3S 120 3 ST Three 3 m leads
Shown actual size, 6 mm
6_120ZE RY81S-3_2012_09_19 KFH-6-120-D17-11L3M3S 120 7.5 ST Three 3 m leads
larger than
actual size,
0.6 mm
Shown
larger than
actual size,
1.5 mm
MODEL NO.
Pkg of 10
0.6 mm GRID
KFH-06-120-D17-11L3M3S 120 1.6 ST Three 3 m leads
1.5 mm GRID
KFH-1.5-120-D17-11L3M3S 120 2.5 ST Three 3 m leads
3 mm GRID
KFH-3-120-D17-11L1M2S 120
KFH-3-350-D17-11L1M2S 350 5.5 ST Two 1 m leads
KFH-3-350-D17-11L3M3S 350 5.5 ST Three 3 m leads
6 mm GRID
KFH-6-120-D17-11L1M2S 120
KFH-6-350-D17-11L1M2S 350 13 ST Two 1 m leads
KFH-6-350-D17-11L3M3S 350 13 ST Three 3 m leads
TANCE
(Ω)
A B C D
0.6
(0.024)
1.5
(0.059)
3.0
(0.12)
6.0
(0.24)
1.1
(0.043)
1.5
(0.059)
2.0
(0.079)
2.0
(0.079)
4.8
(0.19)
5.8
(0.23)
7.4
(0.29)
10.5
(0.41)
9.9
(0.39)
10.2
(0.40)
13.9
(0.55)
18.7
(0.74)
MAX V*
(VRMS)
TEMP
COMP
1.6 ST Two 1 m leads
2.5 ST Two 1 m leads
3 ST Two 1 m leads
7.5 ST Two 1 m leads
TERMINATION
AND
LEAD LENGTH
PER GRID
ACCESSORIES
MODEL NO. DESCRIPTION
TT300 Complete heat cure adhesive kit
SG496 1 oz methyl-based cyanoacrylate (approximately 750 gages)
SG401 0.1 oz ethyl-based cyanoacrylate (approximately 50 gages)
* Maximum permitted bridge energizing voltage (Vrms)
Ordering Examples: KFH-1.5-120-D17-11L1M2S, three 1.5 mm grids in a planar 0°/45°/90° pattern, 120 Ω, with two 1 m leads per grid.
KFH-3-350-D17-11L3M3S, three 3 mm grids in a planar 0°/45°/90° pattern, 350 Ω, with three 3 m leads per grid.
E-4
SPECIFICATIONS
Strain Gage Construction Foil strain gage with embedded measuring grid
Measuring Grid
Material Constantan
Thickness µm (microinch)
Carrier
Material Polyimide
Thickness µm (microinch) 45 ± 10 (1.772 ± 394)
Connections
Nominal Resistance¹ Ω 120 or 350 depending upon gage
Resistance Tolerance¹ % ±0.35
with 0.6 mm and 1.5 mm grid length % ±1
Gage Factor approximately 2 (stated on package)
Gage Factor Tolerance % ±1
with 0.6 mm and 1.5 mm grid length % ±1.5
Temperature coefficient of gage factor 1/K [1/°F] (115 ± 10) x 10
Nominal value of gage factor temperature coefficient Specified on each package
Reference Temperature °C (°F) 23
Operating Temperature Range PTFE cable
for static measurement (zero point related) °C (°F) -10 to 155 (-14 to 320)
for dynamic measurement (not zero point related) °C (°F) -10 to 155 (-14 to 320)
Transverse Sensitivity
for linear 3 mm 120Ω gage % ±0.2
Temperature Response Specified on each package
Temperature response as required, adapted to
coefficient of thermal expansion 10.8 x 10-6 (6.0 x 10-6)
a for aluminum 1/K [1/°F] 23 x 10-6 (12.8 x 10-6)
a for plastic material 1/K [1/°F] 65 x 10-6 (36.1 x 10-6)
a for austenitic steel 1/K [1/°F] 16 x 10-6 (8.9 x 10-6)
a for titanium 1/K [1/°F] 9 x 10-6 (5.0 x 10-6)
a for molybdenum 1/K [1/°F] 5.4 x 10-6 (3.0 x 10-6)
a for quartz 1/K [1/°F] 0.05 x 10-6 (0.3 x 10-6)
Tolerance of temperature response °C (°F) -10 to 120 (-14 to 248)
Mechanical Hysteresis
1) at reference temperature and strain L = 1000 µm/m
(microstrain) on linear 3 mm 120Ω gage
at 1st load cycle and adhesive SG496 µm/m (microstrain)
st
load cycle and adhesive SG496 µm/m (microstrain)
at 3
Maximum Elongation
at reference temperature on linear 3 mm 120Ω gage
Absolute strain value for positive direction µm/m (microstrain)
Absolute strain value for negative direction µm/m (microstrain)
Fatigue Life
at reference temperature on linear 3 mm 120Ω gage
Achievable Number of Load Cycles Lw at
Alternating Strain
zero point variation ≤ 300 µm/m (microstrain) >1 x 10
zero point variation ≤ 30 µm/m (microstrain) 5 x 10
Minimum Radius of Curvature, Longitudinal and
Transverse, at Reference Temperature
within measuring grid area mm (inch) 0.3 (0.012)
within solder tab area mm (inch) 10 (0.394)
Applicable Bonding Materials
Cold Cure Adhesives SG496, SG401
Heat Cure Adhesives TT300
w = ±1000 µm/m and
L
3.8 or 5 (150 or 197), depending upon strain gage type
PTFE wire, Ø - 0.051 mm², approximately 50 mm
long, connected to AWG 28 ribbon cables (PVC
insulated) through solder sleeves in 2- or 3-wire
configurations
-6
[(64 ± 5.5) x 10-6]
1
0.5
20,000 ± 2%
25,000 ± 2.5%
7
(test was stopped)
6
STRAIN GAGES
E
E-5
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