Omega SGT-9 Specification

Download

Page 1

transducer quality strain gage

50-CONDUCTORS

LIMB WIDTH 0.026 mm

GAP WIDTH 0.022 mm

AGL 0.75 mm

19.2 mm

25.4 mm

full bridge linear diaphragm pattern

OMEGA offers transducer quality, linear diaphragm pattern strain gages for use in pressure transducer designs. These patterns have 4 strain gages mounted onto a single carrier. The strain gages in the center will go into tension, and the outer 2 will go into compression. In the pressure transducer design, a diaphragm is clamped around the outer edge, and subjected to a uniform pressure. Near the center of the diaphragm the radial and tangential strains will be positive, and will be nearly equal. The radial strain decreases and becomes negative as you move away from the center toward the outer edge. Midway between the center and the outer edge the strain is at its lowest and the leads/Solder Pads are located in this low stress area. In these patterns, there are 2 half-bridges. Each half-bridge has a common lead/ Solder Pads.

To Order

GAGE PATTERN Leads not shown

actual size,

10.2 mm

actual size,

Shown

13.5 mm

Shown

19.2 mm

Shown

19.2 mm

Shown

25.4 mm

DISCOUNT SCHEDULE

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

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

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

50 and up and OEM ..Consult Factory

MODEL NO. Pkg of 5

SGT-9/350-LD11

SGT-9/350-LD13

SGT-9/350-LD41

SGT-9/350-LD43

SGT-12/350-LD11

SGT-12/350-LD13

SGT-12/350-LD41

SGT-12/350-LD43

SGT-18/350-LD11

SGT-18/350-LD13

SGT-18/350-LD41

SGT-18/350-LD43

SGT-18/1000-LD11

SGT-18/1000-LD13

SGT-18/1000-LD41

SGT-18/1000-LD43

SGT-24/350-LD11

SGT-24/350-LD13

SGT-24/350-LD41

SGT-24/350-LD43

One of the patterns has been enlarged to show the detail. The strain gages and

Gage 2-

terminal pads have been numbered and labeled. The corners of the Wheatstone bridge have been left open for the addition of zero temperature compensation resistors, and zero balance compensation resistors if required. Several sizes are available.

-S

SGT-9/350-LD** can be used for a

0.4" diameter diaphragm.

SGT-12/350-LD** can be used for a

0.5" diameter diaphragm.

SGT-18/350-LD** and SGT-18/1000-LD** can be used for 0.75 to 0.8" diameter diaphragms.

SGT-24/350-LD** can be used for 1" diameter diaphragms.

NOM. RESISTANCE

(Ω)

350

350 6.5

350 4.5

GRID CARRIER

A B C D

0.8 2.6 10.2 4.0 (0.031) (0.102) (0.402) (0.157)

Full-bridge, 10.2 mm (0.4")

diameter diaphragm

350 Ω

DIMENSIONS mm (inch)

†

MAX V*

(Vrms)

4.5

350 6.5

350

350 7.5

350 5.5

1.0 2.6 13.5 4.0 (0.039) (0.102) (0.534) (0.157)

Full-bridge, 13.5 mm (0.5")

diameter diaphragm

350 Ω

5.5

350 7.5

350

350 14

350 10

1.8 5.0 19.2 6.4 (0.071) (0.197) (0.756) (0.252)

Full-bridge, 19.2 mm (0.75 to 0.8")

diameter diaphragm

350 Ω

350 14

1000

1000 13

1000 9

1000 13

350

350 14

350 10

1.8 4.0 19.2 5.5 (0.071) (0.157) (0.756) (0.217)

Full-bridge, 19.2 mm (0.75 to 0.8")

diameter diaphragm, higher

resistance, reduced heat generation

1000 Ω

1.8 5.0 25.4 6.4 (0.071) (0.197) (1) (0.252)

Full-bridge, 25.4 mm (1")

diameter diaphragm

350 Ω

350 14

† For dimensions key, visit us online.

Maximum permitted bridge energizing voltage (Vrms).

Note: For strain gage accessories, visit us online. Ordering Example: SGT-9/350-LD11, package of 5, full bridge linear

diaphragm pattern.

LD11, LD13, LD41 or LD43.

E-39

-Exc

Gage 3+

+Exc

Gage 1+

-S

TERMINATION

Ribbon Leads

Solder Pads

Ribbon Leads

Solder Pads

Ribbon Leads

Solder Pads

Ribbon Leads

Solder Pads

Ribbon Leads

Solder Pads

NOTE

ST = Steel AL = Aluminum

Gage 4-

TEMP COMP

Page 2

8.4 mm

SGT-8/350-LD11

5.5 mm

62-CONDUCTORS

LIMB 0.036 mm

GAP 0.030 mm

AGL 1.1 mm

transducer quality

8.4 mm

12.25 mm

strain gage

1/2 bridge linear diaphragm

The following types of linear diaphragm strain gages can be used when the bonding area is larger than the diaphragm diameter. For example, if a body has a flat surface with a diameter of 1" onto which the strain gage is to be bonded, but a 0.5" diameter hole is drilled through the body leaving just a thin layer of material, then this thin

0.5" diameter is the diaphragm. So the strain gage grids are located above the thin high stress area and the leads/ solder pads are over the solid part of the body in the low stress area. This linear diaphragm pattern has 2 strain gages mounted onto a single carrier. These types are used in pairs on a

0.5" diameter diaphragm. The strain gage closer to center will go into tension, and the outer gage will go into compression. Near the center of the diaphragm the radial and tangential strains will be positive, and will be nearly equal. The radial strain decreases and becomes negative as you move away

To Order

GAGE PATTERN Leads not shown

actual size,

Shown

8.4 mm

Shown

8.4 mm

MODEL NO. Pkg of 5

SGT-8/350-LD11

SGT-8/350-LD13

SGT-8/350-LD41

SGT-8/350-LD43

SGT-8/500-LD11

SGT-8/500-LD13

SGT-8/500-LD41

SGT-8/500-LD43

from the center toward the outer edge of the diaphragm. The leads/solder pads are in the low stress area over thicker material. In this pattern, each carrier piece has one half-bridge with a common lead/solder pad. The corners of the Wheatstone bridge have been

2 half-bridges mounted onto one carrier piece, which can be used on a 0.28” diameter diaphragm again where the bonding area is larger. The grids are placed, centered over the diaphragm, and the leads/solder pads are over solid

material in a low stress area. left open for the addition of zero temperature compensation resistors, and zero balance compensation resistors, if required. SGT-8/350-LD** and SGT/500-LD** are used in pairs on a 0.5" diameter diaphragm. Below we show

Top View

-E

-S

Edge view showing placement

a diagram with 2 pieces of the SGT-8/350-LD**, shown as they might be positioned on a 0.5" diameter diaphragm. The strain gages have been numbered and labeled. Also available is the SGT-7/350-LD** which offers

NOM. RESISTANCE

(Ω)

350

350 10

350 7

350 10

500

500 11

500 75

500 11

GRID CARRIER

A B C D

1.1 4.3 8.4 5.5 (0.043) (0.169) (0.331) (0.217)

Half-bridge, used in pairs, 13 mm

(0.5") diameter diaphragm

350 Ω

1.2 4.3 8.4 5.5

(0.047) (0.169) (0.331) (0.217)

Half-bridge, used in pairs, 13 mm

(0.5") diameter diaphragm

nominal resistance

500 Ω

DIMENSIONS mm (inch)

†

2- 4-3+ 1+

Diaphragm

MAX V*

(Vrms)

TERMINATION

Ribbon Leads

Solder Pads

Ribbon Leads

7.5

Ribbon Leads

Solder Pads

TEMP COMP

-S

STRAIN GAGES

full bridge linear diaphragm

To Order

GAGE PATTERN Leads not shown

actual size,

Shown

12.3 mm

DISCOUNT SCHEDULE

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

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

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

50 and up and OEM ..Consult Factory

MODEL NO. Pkg of 5

SGT-7/350-LD11

SGT-7/350-LD13

SGT-7/350-LD41

SGT-7/350-LD43

NOM.

RESIS-

TANCE

(Ω)

350

350 5

350 3.5

350 5

† For dimensions key, visit us online.

Maximum permitted bridge energizing voltage (Vrms).

Note: For strain gage accessories, visit us online. Ordering Example: SGT-8/350-LD11, package of 5, half bridge linear

diaphragm pattern.

GRID CARRIER

A B C D

0.5 2.5 12.3 5.8

(0.02) (0.098) (0.484) (0.228)

Full-bridge, 7 mm (0.28")

diameter diaphragm

350 Ω

DIMENSIONS mm (inch)

†

MAX V*

(Vrms)

3.5

LD11, LD13, LD41 or LD43.

E-40

TERMINATION

Ribbon Leads

Solder Pads

NOTE

ST = Steel AL = Aluminum

TEMP COMP