micro-measurements@vishay.com
Sealed Weldable Strain Gages
Vishay Micro-Measurements
Document Number: 11533
Revision 21-May-03 www.vishaymg.com
1
Special Purpose Strain Gages - Sealed Weldable Strain Gages
Vishay Micro-Measurements Sealed Weldable Strain Gages
are specially designed for spot welding to structures and
components. They are ideally used for applications where
test or environmental conditions preclude clamping and
curing an adhesively bonded gage installation. These gages
are equally advantageous when strain measurements must
be made at elevated temperatures, but the nature of the test
object does not permit the use of an elevated-temperature-
curing adhesive. Additionally, all Vishay Micro-
Measurements Sealed Weldable Strain Gages come with a
preinstalled protective coating providing both protection in
moist environments and savings in the time and effort
required for making the complete gage installation.
All sensors are fabricated with EA-Series strain gages,
laboratory-prebonded with a high-performance adhesive to a
thin [0.005 in (0.127 mm)] stainless steel carrier, and fully
encapsulated for protection against moisture. They have a
±5000 microinch/in strain range, and a normal operating
temperature range of +32°F (0°C) to +180°F (+83°C). These
gages can be used on surfaces with a radius of curvature of
3.0 in (76 mm) or greater.
The three leadwire-series of Vishay Micro-Measurements
Sealed Weldable Strain Gages have physical constructions
designed for various environmental exposures and
installation constraints.
R-LEADWIRE-SERIES
These gages are designed for long-term out-of-doors use.
Primarily used in applications such as railroad and civil
structures, they can be exposed to oil and water splash and
short-term submersion in water of shallow [24 in (60 cm)]
depth. The metal carrier is processed to give good first cycle
data, excellent fatigue resistance and a high strain range.
Exposure of the vinyl-insulated cable to strong solvents -
especially MEK - should be avoided to prevent damage.
Long-term exposure to sub-freezing temperatures requires
careful handling to avoid cracking of the vinyl insulation.
DESIGNATION NOMINAL NOMINAL GRID GAGE LEADWIRE SHIM SHIM
RESISTANCE GAGE GEOMETRY LENGTH LENGTH WIDTH
(Ohms) FACTOR (in) (in) (in)
350 2.0 Axial 0.125 Vinyl 0.8 0.4
350 2.0 Shear 0.125 Vinyl 1.0 0.5
LEA-06-W125E-350/3R
LEA-06-W125F-350/3R
Configuration
Bridge Circuit Configuration
Bridge Circuit
Black
White
Red
0.20"
0.30"
EA-06-125BZ-350
Black
Red
White
EA-06-125TK-350
0.25"
0.35"
micro-measurements@vishay.com
Sealed Weldable Strain Gages
Vishay Micro-Measurements
Document Number: 11533
Revision 21-May-03
www.vishaymg.com
2
Special Purpose Strain Gages - Sealed Weldable Strain Gages
T-LEADWIRE-SERIES
This series is designed to withstand exposure to water
pressures of up to 500 psi. They can also withstand short-
term (up to 14 days) immersion in crude oil. A flexible
stainless steel tube, providing wire routing from the strain
gage to a cable transition, enables fine positioning of the
L-LEADWIRE-SERIES
The L-Leadwire-Series sensors are designed to have a
performance similar to the T-Leadwire-Series but without a
cable transition. They can be used in similar applications
when the sensor will be exposed to smaller strains, and care
sensor as well as providing strain relief. These sensors are
typically used on larger civil structures, including bridges,
dams, and buildings, or for exposures of up to a year in
seawater.
DESIGNATION NOMINAL NOMINAL GRID GAGE LEADWIRE SHIM SHIM
RESISTANCE GAGE GEOMETRY LENGTH LENGTH WIDTH
(Ohms) FACTOR (in) (in) (in)
350 2.0 Axial 0.125 Shielded Vinyl 0.8 0.4
350 2.0 Axial 0.125 Shielded Vinyl 1.0 0.5
can be taken during installation to anchor the leadwire to
provide for strain relief. The L-Leadwire-Series gages are
particularly useful where space constraints preclude the use
of the cable transition of T-Leadwire-Series gages.
DESIGNATION NOMINAL NOMINAL GRID GAGE LEADWIRE SHIM SHIM
RESISTANCE GAGE GEOMETRY LENGTH LENGTH WIDTH
(Ohms) FACTOR (in) (in) (in)
350 2.0 Axial 0.125 Shielded Vinyl 1.5 0.6
350 2.0 Shear 0.125 Shielded Vinyl 1.5 0.6
LEA-06-W125E-350/10T
LEA-06-W125F-350/10T
LEA-06-W125E-350/10L
LEA-06-W125F-350/10L
EA-06-125BZ-350
0.20"
0.30"
TRANSISTION
WELDABLE ANCHOR SHIM
S.S. TUBE 1.5"
EA-06-125TK-350
0.35"
0.25"
0.35"
0.30"
EA-06-125BZ-350
0.35"
0.30"
Configuration
Configuration
Configuration
Configuration
Bridge Circuit
Bridge Circuit
Bridge Circuit
Bridge Circuit
Black
White
Red
Black
Red
White
Black
White
Red
Black
Red
White
