Omega Products SGT-3-1000-FB11 User Manual

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TRANSDUCER QUALITY STRAIN GAGE

I

N

REGULATED

DC

V

1

OUT

V

2

3

4

–

+

–

+

+ Sig

- Sig

- Exc

+

Exc

T

ENSION

COMPRESSION

FULL WHEATSTONE BRIDGE, REVERSED-BENDING
BEAM OR CONTRAFLEXURE BEAM ALL GRIDS
IN THE SAME DIRECTION

Design and build your own transducers.
These full bridge strain gages might be
used to design transducers for beams
that have a contraflexure point.
Contraflexure is defined as a point in a
structure where bending occurs in
opposite directions. This may also be
described as a reversed bending beam,
or a double bending beam. The 4 grids
are linear, all in the same direction.
Look up the modulus of elasticity and
the yield strength of your material, and
design the spring element so that you
will be working in the linear portion of
the stress-strain curve. For best results
use stainless steel or aluminum and
match the strain gage temperature

Wheatstone Bridge

characteristics. You may use these full
bridge strain gages for bending strain
applications where only one side of the
beam is available for strain gage
installation. These gages are easy to
work with as the carrier piece has all
4 strain gages for fast and easy
installation. Having one carrier with
multiple strain gages offers several
advantages. Alignment of the 4 strain
gages with respect to each other is
already done. Some of the strain gages
share common ribbon leads or Solder
Padss which saves wiring steps and
valuable time. The corners of the
Wheatstone bridge at the signal output
have been left open so that sensor

s

n

tio

a

u

q

E

e

e

S

Pa

n

o

a

2

-1

E

e

g

3

-1

E

d

n

performance can be tested and
improved. Zero temperature
compensation resistors and zero
balance compensation resistors can be
easily added into the open corners of
the Wheatstone bridge circuit. An extra
bondable terminal pad can be placed at
the open corner so that the appropriate
resistors can be wired in. Or you can
simply connect your 4 leads
(+Excitation, -Excitation, +Signal,

-Signal) and jumper the signal leads
together as needed to complete the
Wheatstone bridge. Power up your
transducer, and calibrate it with a known
applied load.

-Sig

-Exc
+Sig

+Exc

+Sig

-Exc

-Sig

-Sig

4

2

4
2

1

3

1
3

+Sig
+Exc

-Sig

MOST POPULAR MODELS HIGHLIGHTED!

To Order (Specify Model Number)

1 to 10 pkgs . . . . . . . . . . . . . . . . . . .Net

11 to 24 pkgs . . . . . . . . . . . . . . . . . .5%

25 to 49 pkgs . . . . . . . . . . . . . . . . .10%

50 and up and OEM . .Consult Factory

MODEL NO. OF 5 (Ω)A B C D(Vrms)

Shown smaller

than actual size,

13.8 mm

SGT-3E/350-FB11 $100.50 350 7.5 Ribbon Leads ST

SGT-3E/350-FB13 100.50 350 11 Ribbon Leads AL

SGT-3E/350-FB41 85.50 350 7.5 Solder Pads ST

Leads not shown

Shown smaller

than actual size,

15..9 mm

SGT-3E/350-FB43 85.50 350 11 Solder Pads AL

SGT-3F/350-FB11 $102.00 350 7.5 Ribbon Leads ST

SGT-3F/350-FB13 102.00 350 11 Ribbon Leads AL

SGT-3F/350-FB41 87.00 350 7.5 Solder Pads ST

Leads not shown

Shown smaller

than actual size,

28 mm

SGT-3F/350-FB43 87.00 350 11 Solder Pads AL

SGT-3/1000-FB11 $105.50 1000 13 Ribbon Leads ST

SGT-3/1000-FB13 105.50 1000 17 Ribbon Leads AL

SGT-3/1000-FB41 90.50 1000 13 Solder Pads ST

Leads not shown

DISCOUNT SCHEDULE

SGT-3/1000-FB43 90.50 1000 17 Solder Pads AL

PRICE NOM. DIMENSIONS

PER RESIS­PKG TANCE

GRID CARRIER

mm (in)

†

MAX V*

3.2 1.5 13.8 6.8

(0.126) (0.059) (0.543) (0.268)

Full bridge pattern for double

bending beam, center line spacing

6.35 mm (0.25")

350 Ω

3.2 1.5 15.9 6.8

(0.126) (0.059) (0.626) (0.268)

Full bridge pattern for double

bending beam, center line spacing

8.38 mm (0.33")

350 Ω

3.0 1.6 28.0 4.9

(0.118) (0.063) (1.102) (0.193)

Full bridge pattern for double

bending beam, higher resistance,

reduced heat generation, center line

spacing 15 mm (0.59")

1000 Ω

† For dimensions key, see page E-44.

Maximum permitted bridge energizing voltage (Vrms).

*

Note: For strain gage accessories see pages E-56 to E-59.
Ordering Example: SGT-3/1000-FB11, package of 5 full bridge pattern

for double bending beam, nominal resistance 1000 Ω, $105.50.

E-46

TERMINATION COMP

TEMP

NOTE

ST = Steel
AL = Aluminum

STRAIN GAGES

E

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