full-bridge strain gauges for force transducers bending beam working principle. for the purpose of...

BCM SENSOR TECHNOLOGIES BVBA

Brechtsebaan 2

B-2900 Schoten - Antwerpen, BELGIUM

Industriepark Zone 4, Tel.: +32-3-238 6469

Fax: +32-3-238 4171

website: www.bcmsensor.com

email: [email protected]

Full-Bridge Strain Gauges for Force Transducers

BCM SENSOR full-bridge strain gauges are specially developed for manufacturing precision force transducers which

employ bending beam working principle. For the purpose of this specific application, the full-bridge strain gauges are

temperature and creep compensated, and they can be either encapsulated or open-face according to the requirement.

The karma gauges can be manufactured with effective modulus compensation (EMC). The EMC gauges are mostly for

manufacturing low-cost force transducers, because with the EMC gauges the manufacturers can eliminate the use of

compensation resistors and achieve the sensitivity compensation.

For creep compensation, there are 18 creep codes: “N10, N9, N8, ..., O, ..., P5, P6, P7". The “N10” is the most negative

creep code, while the “P7" is the most positive one. The “O” stands for a moderate creep code. For a specific strain

gauge, please find its available creep code below its dimensions at the “Option *9" on the following pages. For a

customized creep code, consult BCM SENSOR.

For more information on temperature compensation (STC), creep compensation, and EMC of strain gauges, please refer

to the corresponding articles respectively on the website of BCM SENSOR.

Ordering Information

Description

Notes: (1) The center distance of two grids only applies to the half-bridge and full-bridge strain gauges.

(2) The length of the leads and wires can be customized on request.

(3) The highest operating temperature of enamel insulated copper wires (CW) is 150°C.

1/8

ordering code example:

gauge length in mm

gauge resistance in Ohm

backing layer

metal foil

gauge type

gauge pattern

STC or EMC number of gauges

(1)center distance between two grids

creep code of gauges

solder-pads

C: constantanK: karma

E: encapsulated gaugeO: open-face gauge

material

titaniummartensitic SS, mild steelaustenitic SS, copperaluminummagnesiumplexiglass

STC

9 11 16 23 27 65

N.A. M11 M16 M23 N.A. N.A.

creep code

N10, N9, N8, N7, N6, N5, N4, N3, N2, N1, O, P1, P2, P3, P4, P5, P6, P7

solder-pads finishing

SP: naked solder padsSD: tined solder dot, available only for karma gaugesRL: silver-coated round copper leads (30mm)

(2)

FR: silver-coated flat copper leads (30mm)(2)

(3)CW : enamel insulated copper wires (30mm)

(2)

F: phenolic resinmodified

B: laminated polyether-ketoneI: polyimide resinmodified

A: advanced laminated polyimide

L: laminated polyimide

EMC


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Technical Data

EKF-350-1.5FG-L-(11)-10.5-O-SD

EKF-350-1.5FG-L-(23)-10.5-O-SD

EKF-1000-1.5FG-L-(11)-10.5-O-SD

EKF-1000-1.5FG-L-(23)-10.5-O-SD

Gauge Length

Grid Width

Backing Width

Backing Length

Gauge Type

E: encapsulated

O: open-face

F (-30 ~ +80°C),

I (-85 ~ +150°C),

B (-45 ~ +150°C),

A (-195 ~ +200°C),

L (-55 ~ +150°C).

Backing Material(Working Temp.) STC or EMC

11 or M11: martensitic steel (e.g.,

mild steel, 17-4PH SS)

16 or M16: austenitic steel (e.g., 304 SS),

or copper

23 or M23: aluminum

Creep Code

350 : O;

1000 : N7, N6,

N5, N4, N3, N2,

N1, O, P1, P2

Ω

Ω

Solder-pad Finishing

SP: naked solder pads

SD: solder dots

RL: round copper leads

FR: flat copper leads

CW: enamel insulated

copper wires

2.41.5 14.4 6.4

0.059 0.094 0.567 0.252

Suggested Ordering Codes

Dimensions in mm and inch

Variants: *1K*3-350-1.5FG-L-(*7)-10.5-*9-*10, and *1K*3-1000-1.5FG-L-(*7)-10.5-*9-*10

FG-L Pattern Full-Bridge Strain Gauges: Karma, 1.5mm, 350Ω and 1000Ω

Schematic Diagram:

Center distance between two grids: 10.5mm

ECF-350-3FG-L-(11)-10.5-O-SP

ECF-350-3FG-L-(23)-10.5-O-SP

EKF-1000-3FG-L-(11)-10.5-O-SD

EKF-1000-3FG-L-(23)-10.5-O-SD

Gauge Length

Grid Width

Backing Width

Backing Length

Gauge Type

E: encapsulated

O: open-face

F (-30 ~ +80°C),

I (-85 ~ +150°C),

B (-45 ~ +150°C),

A (-195 ~ +200°C),

L (-55 ~ +150°C).





or copper

23 or M23: aluminum

Note: E.M.C. is only for karma (K) gauges.

Creep Code

350 : O;

1000 : O, P1

Ω

Ω



SD: solder dots




copper wires

2.53.0 17.4 6.4

0.118 0.098 0.685 0.252



Variants: *1C*3-350-3FG-L-(*7)-10.5-*9-*10, and *1K*3-1000-3FG-L-(*7)-10.5-*9-*10

FG-L Pattern Full-Bridge Strain Gauges: 3.0mm, 350Ω and 1000Ω



Option *1 Option *3 Option *7 Option *9 Option *10


R3R1

R2 R4

Schematic Diagram:

R3R1

R2 R4

R1 R2

R3R4

A

B

C

D

A B C D

R1 R2

R3R4

A

B

C

DA B C D

2/8


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EKF-350-1.5FG-BL-(11)-6-N1-SD

EKF-350-1.5FG-BL-(23)-6-N1-SDGauge Length

Grid Width

Backing Width

Backing Length

Gauge Type

E: encapsulated

O: open-face

F (-30 ~ +80°C),

I (-85 ~ +150°C),

B (-45 ~ +150°C),

A (-195 ~ +200°C),

L (-55 ~ +150°C).





or copper

23 or M23: aluminum

Creep Code

N3, N1



SD: solder dots




copper wires

2.21.5 9.3 6.1

0.059 0.087 0.366 0.240



Variants: *1K*3-350-1.5FG-BL-(*7)-6-*9-*10

FG-BL Pattern Full-Bridge Strain Gauges: Karma, 1.5mm, 350Ω


EKF-2000-2FG-BL-(11)-10.5-N7-SD

EKF-2000-2FG-BL-(23)-10.5-N7-SDGauge Length

Grid Width

Backing Width

Backing Length

Gauge Type

E: encapsulated

O: open-face

F (-30 ~ +80°C),

I (-85 ~ +150°C),

B (-45 ~ +150°C),

A (-195 ~ +200°C),

L (-55 ~ +150°C).





or copper

23 or M23: aluminum


Creep Code

N7



SD: solder dots




copper wires

3.32.0 14.3 7.8

0.079 0.130 0.563 0.307



Variants: *1K*3-2000-2FG-BL-(*7)-10.5-*9-*10

FG-BL Pattern Full-Bridge Strain Gauges: Karma, 2.0mm, 2000Ω

Center distance between two grids: 10.5mmSchematic Diagram:


Schematic Diagram:



R1 R2

R3R4

A

B

C

D

A B C D

R1

R2

R3

R4

R1 R2

R3R4

A

B

C

D

A B C D

R1

R2

R3

R4

3/8


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ECF-350-3.1FG-BL-(11)-10.5-O-SP

ECF-350-3.1FG-BL-(23)-10.5-O-SP

EKF-1000-3.1FG-BL-(11)-10.5-O-SD

EKF-1000-3.1FG-BL-(23)-10.5-O-SDGauge Length

Grid Width

Backing Width

Backing Length

Gauge Type

E: encapsulated

O: open-face

F (-30 ~ +80°C),

I (-85 ~ +150°C),

B (-45 ~ +150°C),

A (-195 ~ +200°C),

L (-55 ~ +150°C).





or copper

23 or M23: aluminum


Creep Code

N7, N6, N5, N4,

N3, N2, N1, O,

P1, P2



SD: solder dots




copper wires

2.83.1 15.3 6.8

0.122 0.110 0.602 0.268



Variants: *1C*3-350-3.1FG-BL-(*7)-10.5-*9-*10, and *1K*3-1000-3.1FG-BL-(*7)-10.5-*9-*10

FG-BL Pattern Full-Bridge Strain Gauges: 3.1mm, 350Ω and 1000Ω

Schematic Diagram:



Note: Previously the gauge length of these gauges were indicated as “3” instead of “3.1”. For instance, the ordering codes were:ECF-350-3FG-BL-(11)-10.5-O-SPEKF-1000-3FG-BL-(11)-10.5-O-SD

ECF-350-3.1FF-L-(11)-10.5-O-SP

ECF-350-3.1FF-L-(23)-10.5-O-SP

EKF-1000-3.1FF-L-(11)-10.5-O-SD

EKF-1000-3.1FF-L-(23)-10.5-O-SD

Gauge Length

Grid Width

Backing Width

Backing Length

Gauge Type

E: encapsulated

O: open-face

F (-30 ~ +80°C),

I (-85 ~ +150°C),

B (-45 ~ +150°C),

A (-195 ~ +200°C),

L (-55 ~ +150°C).





or copper

23 or M23: aluminum


Creep Code

350 : O;

1000 : N6, N5,

N4, N3, N2, O

Ω

Ω



SD: solder dots




copper wires

3.23.1 17.9 8.4

0.122 0.126 0.705 0.331



Variants: *1C*3-350-3.1FF-L-(*7)-10.5-*9-*10, and *1K*3-1000-3.1FF-L-(*7)-10.5-*9-*10

FF-L Pattern Full-Bridge Strain Gauges: 3.1mm, 350Ω and 1000Ω

Schematic Diagram:




R1 R2

R3R4

A

B

C

D

R1 R3

A B C D

R2R4

R1 R2

R3R4

A

B

C

D D’A B CD D’

R1

R2

R3

R4

4/8


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ECF-350-1.5FF-AL-(11)-10.5-N2-SP

ECF-350-1.5FF-AL-(23)-10.5-N2-SPGauge Length

Grid Width

Backing Width

Backing Length

Gauge Type

E: encapsulated

O: open-face

F (-30 ~ +80°C),

I (-85 ~ +150°C),

B (-45 ~ +150°C),

A (-195 ~ +200°C),

L (-55 ~ +150°C).

Backing Material(Working Temp.) S.T.C.

11: martensitic steel (e.g., mild steel,

17-4PH SS)

16: austenitic steel (e.g., 304 SS), or

copper

23: aluminum

Creep Code

N5, N4, N2






copper wires

2.51.5 13.9 6.5

0.059 0.098 0.547 0.256



Variants: *1C*3-350-1.5FF-AL-(*7)-10.5-*9-*10

FF-AL Pattern Full-Bridge Strain Gauges: 1.5mm, 350Ω

Schematic Diagram:


EKF-350-1.5FF-BL-(11)-6-N3-SD

EKF-350-1.5FF-BL-(23)-6-N3-SDGauge Length

Grid Width

Backing Width

Backing Length

Gauge Type

E: encapsulated

O: open-face

F (-30 ~ +80°C),

I (-85 ~ +150°C),

B (-45 ~ +150°C),

A (-195 ~ +200°C),

L (-55 ~ +150°C).





or copper

23 or M23: aluminum

Creep Code

N3



SD: solder dots




copper wires

2.21.5 9.2 6.2

0.059 0.087 0.362 0.244



Variants: *1K*3-350-1.5FF-BL-(*7)-6-*9-*10

FF-BL Pattern Full-Bridge Strain Gauges: Karma, 1.5mm, 350Ω





R1 R2

R3R4

A

B

C

D D’

AB

C

D

D’

R1

R2

R3

R4

R1 R2

R3R4

A

B

C

D D’

A B CD D’

R1

R2

R3

R4

5/8


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EKF-350-1.8EB-(11)-N2-SD

EKF-350-1.8EB-(23)-N2-SDGauge Length

Grid Width

Backing Width

Backing Length

Gauge Type

E: encapsulated

O: open-face

F (-30 ~ +80°C),

I (-85 ~ +150°C),

B (-45 ~ +150°C),

A (-195 ~ +200°C),

L (-55 ~ +150°C).





or copper

23 or M23: aluminum

Creep Code

N2



SD: solder dots




copper wires

2.21.8 7.4 8.5

0.071 0.087 0.280 0.335



Variants: *1K*3-350-1.8EB-(*7)-*9-*10

EB Pattern Full-Bridge Strain Gauges: Karma, 1.8mm, 350Ω

Schematic Diagram:


ECF-350-3.1FF-BL-(11)-10.5-O-SP

ECF-350-3.1FF-BL-(23)-10.5-O-SP

EKF-1000-3.1FF-BL-(11)-10.5-O-SD

EKF-1000-3.1FF-BL-(23)-10.5-O-SD

Gauge Length

Grid Width

Backing Width

Backing Length

Gauge Type

E: encapsulated

O: open-face

F (-30 ~ +80°C),

I (-85 ~ +150°C),

B (-45 ~ +150°C),

A (-195 ~ +200°C),

L (-55 ~ +150°C).





or copper

23 or M23: aluminum


Creep Code

350 : O;

1000 : N5, N3,

N2, O

Ω

Ω



SD: solder dots




copper wires

2.83.1 15.3 7.0

0.122 0.110 0.602 0.276



Variants: *1C*3-350-3.1FF-BL-(*7)-10.5-*9-*10, and *1K*3-1000-3.1FF-BL-(*7)-10.5-*9-*10

FF-BL Pattern Full-Bridge Strain Gauges: 3.1mm, 350Ω and 1000Ω




R1 R2

R3R4

A

B

C

D D’

A B CD D’

R1

R2

R3

R4

R1 R2

R3R4

A

B

C

D

A B C D

R1 R2

R3R4

6/8


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EKF-350-1.8EC-(11)-N2-SD

EKF-350-1.8EC-(23)-N2-SDGauge Length

Grid Width

Backing Width

Backing Length

Gauge Type

E: encapsulated

O: open-face

F (-30 ~ +80°C),

I (-85 ~ +150°C),

B (-45 ~ +150°C),

A (-195 ~ +200°C),

L (-55 ~ +150°C).





or copper

23 or M23: aluminum

Creep Code

N2



SD: solder dots




copper wires

2.31.8 7.4 8.4

0.071 0.091 0.291 0.331



Variants: *1K*3-350-1.8EC-(*7)-*9-*10

EC Pattern Full-Bridge Strain Gauges: Karma, 1.8mm, 350Ω

Schematic Diagram:


ECF-350-2.3EB-(11)-O-SP

ECF-350-2.3EB-(23)-O-SP

EKF-1000-2.3EB-(11)-N2-SD

EKF-1000-2.3EB-(23)-N2-SD

Gauge Length

Grid Width

Backing Width

Backing Length

Gauge Type

E: encapsulated

O: open-face

F (-30 ~ +80°C),

I (-85 ~ +150°C),

B (-45 ~ +150°C),

A (-195 ~ +200°C),

L (-55 ~ +150°C).





or copper

23 or M23: aluminum


Creep Code

350 : O;

1000 : N2

Ω

Ω



SD: solder dots




copper wires

2.72.3 8.6 7.2

0.091 0.106 0.339 0.283



Variants: *1C*3-350-2.3EB-(*7)-*9-*10, and *1K*3-1000-2.3EB-(*7)-*9-*10

EB Pattern Full-Bridge Strain Gauges: 2.3mm, 350Ω and 1000Ω

Schematic Diagram:



R1 R2

R3R4

A

B

C

D

A B C D

R1 R2

R3R4

R1 R2

R3R4

A

B

C

D D’

A B CD D’

R1 R2

R3R4

7/8


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ECF-350-2.3EC-(11)-O-SP

ECF-350-2.3EC-(23)-O-SP

EKF-1000-2.3EC-(11)-N2-SD

EKF-1000-2.3EC-(23)-N2-SD

Gauge Length

Grid Width

Backing Width

Backing Length

Gauge Type

E: encapsulated

O: open-face

F (-30 ~ +80°C),

I (-85 ~ +150°C),

B (-45 ~ +150°C),

A (-195 ~ +200°C),

L (-55 ~ +150°C).





or copper

23 or M23: aluminum


Creep Code

350 : O;

1000 : N2

Ω

Ω



SD: solder dots




copper wires

2.72.3 8.6 7.5

0.091 0.106 0.339 0.295



Variants: *1C*3-350-2.3EC-(*7)-*9-*10, and *1K*3-1000-2.3EC-(*7)-*9-*10

EC Pattern Full-Bridge Strain Gauges: 2.3mm, 350Ω and 1000Ω

Notes:

(1) The black and grey letters and numbers(*) on the strain gauge patterns are only for the indication and not on the real strain gauges.

(*): The black letters and numbers refer to: R1, R2, R3, R4; the grey letters refer to: A, B, C, D, D’.

(2) The listed specifications and dimensions are subject to change without prior notice.


Schematic Diagram:

R1 R2

R3R4

A

B

C

D D’

A B CD D’

R1 R2

R3R4

EKF-350-1.8ED-(11)-O-SD

EKF-350-1.8ED-(23)-O-SD

EKF-1000-1.8ED-(11)-O-SD

EKF-1000-1.8ED-(23)-O-SD

EKF-1200-1.8ED-(11)-O-SD

EKF-1200-1.8ED-(23)-O-SD

Gauge Length

Grid Width

Backing Width

Backing Length

Gauge Type

E: encapsulated

O: open-face

F (-30 ~ +80°C),

I (-85 ~ +150°C),

B (-45 ~ +150°C),

A (-195 ~ +200°C),

L (-55 ~ +150°C).





or copper

23 or M23: aluminum

Creep Code

O



SD: solder dots




copper wires

1.81.8 7.9 5.2

0.071 0.071 0.311 0.205



Variants: *1K*3-350-1.8EC-(*7)-*9-*10

ED Pattern Full-Bridge Strain Gauges: Karma, 1.8mm, 350Ω, 1000Ω, 1200Ω

Schematic Diagram:


R1

R2

R3

R4

R1 R2

R3R4

A

B

C

D

A B C D

8/8

full-bridge strain gauges for force transducers bending beam working principle. for the purpose of...

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