Strain Gauge for stress analysis

Introduction

Strain Gauges for Stress Analysis

The Strain gauges which Peekel delivers represent-advanced technologies in R&D, manufacturing, technical support and consultancy in the application of metal foil strain gauges. The strain gauges are developed and manufactured in China and ment for transducer application and stress analysis. In product category of strain gauges, Peekel offer both metal foil strain gauges and semiconductor strain gauges.

Metal foil strain gauges include the following four class strain gauges:

Class-A : gauges specially designed for manufacturing of high-accuracy transducers (better than 0.02%FS).

Class-B : temperature compensated gauges suitable for transducers (0.05%FS) and stress analysis of high accuracy.

Class-C : gauges designed for stress analysis.

Class-D : gauges for stress analysis in some critical measurement conditions.

Semiconductor strain gauges are especially designed to following problems: - to probe the very weak or very small signals - to compensate for a significant non-linearity encountered in manufacturing of transducers

Thanks to the higher signal output compared to the metal foil strain gauges, the semiconductor strain gauges have been playing an important role in both transducer application and strain measurements.

Peekel also delivers bondable resistors that are used for temperature and modulus compensation in transducer production, and bondable terminals that are necessary for wire connection between strain gauges and instruments. In addition, Peekel are able to supply gauge installation accessories (strain-gauge adhesives, protective coatings and sealants, bonding tools, solid copper wires... ) that are useful in gauge installation process. With those accessories, one can easily bond the strain gauge on to the object surface for transducer application or stress analysis. To assist gauge application, gauge installation instructions are given as a reference document that may be useful in order to achieve quality installation of strain gauges.

As a kind of foil resistors, foil RTD's (resistance temperature detectors) and foil surface-heat gauges, are also presented in this category. Foil RTD's are proved to be a powerful sensing element for the temperature measurement of metal surfaces, e.g. the metal surface of fluid transmission lines and the surface of car engines. The foil surface-heat gauges are mainly used for measurement of friction-induced strain.

Metallic Foil Strain Gauges

Strain Gauge Coding System For better utilization of strain gauges, it is important to choose a correct strain gauge for your particular application. Peekel strain gauges are organised in gauge part numbers (P/N). The aim of this gauge coding system is to assist you in selection of a correct strain gauge according to its P/N.

For more detailed information about self-temperature compensation (STC) of strain gauges, please refer to the topic of STC.


Self-Temperature Compensation (STC) All the strain gauges for transducer application (class-A and B) and the most strain gauges for stress analysis (class-C and D), are designed to possess self-temperature compensation (STC) and available for a number of spring materials element. Listed in the Strain Gauge Coding System is the STC number for the given material. There are even more materials listed in the following Table-STC. This table lists a relation of the STC number of strain gauges and the thermal expansion coefficients () of the related material, which the strain gauge is bonded to.

versus STC No.

Materials (in ppm/C) S.T.C. Number (in ppm/F) aluminium 2024-T4 24.7 23 13.7 aluminium 7075-T6 23.4 23 13.0 beryllium 12.1 11 6.7 beryllium Copper 16.7 16 9.3 copper 16.8 16 9.3 glass, soda lime 9.2 9 5.1 glass, crystal 12.9 11 6.7 inconel 12.1 11 6.8 iron 11.7 11 6.5 lead 28.4 27 16.1 magnesium 26.5 27 14.6 monel cast iron 13.5 11 7.5 nickel 12.7 11 6.7 platinum 8.9 9 4.9 selenium 26.3 27 14.5 stainless steel 304 17.4 16 9.7 stainless steel 310 14.7 16 8.1 stainless steel 316 16.0 16 8.9 stainless steel 410 10.2 11 5.7 steel 1008 & 1018 12.1 11 6.7 steel 4340 11.4 11 6.3 steel 15-7PH 9.0 9 5.1 steel 17-4PH 10.8 11 6.1 steel 17-9PH 10.7 11 5.9 steel 17-7PH 10.5 11 5.8 tin 23.1 23 13.0 titanium 8.5 9 4.7 titanium 6AI-4V 8.9 9 4.9 plexiglass 65.2 65 36.2

Remarks:

1) Listed in Strain Gauge Coding System, the STC number is only for available STC strain gauges of relating materials. 2) The value of a given material is recorded in ppm/C unit. As a reference, the corresponding value of in ppm/F unit is listed in the last column.


Strain Gauges for Stress Analysis For the application of stress analysis and strain measurement, there are two classes of strain gauges available: class-C and class-D. As long as temperature compensation has to be taken into account in stress analysis to achieve a better accuracy in measurements, it is recommended the class-C gauges.

If the stress analysis is performed at high temperature (250 C) or performed in some special cases, such as in water-proof or for high elongation measurements, it is recommended to choose the class-D gauges for those specific conditions.

The strain gauges are organised according to their part number (P/N). For a better understanding of the strain gauges' P/N, please refer to the Strain Gauge Coding System.

Listed below is an overview of the specifications of those two classes of strain gauges. To choose a specific gauge, please look through the gauge-list on the following pages:

Class-C gauges Class-D gauges

1. Specifications class-C strain gauges

In the group of class-C gauges, most of the gauges are temperature compensated strain gauges.

Strain Gauges for Precision Stress Analysis ECH series ECI series OCP series gauge features encapsulated gauges with

temperature compensation, good flexibility for installation

encapsulated gauges with temperature compensation, higher elongation

open-faced gauges with thinner backing, good flexibility for gauge installation

metal foil constantan alloy constantan alloy constantan alloy backing material phenolic acetal resin polyimide resin paper-based acetal resin cover material, or surface protection

phenolic acetal cover phenolic acetal cover acetal-resin surface protective coating

nominal resistance ( ) 60, 120, 350, 650 120, 350 120 tolerance of resistance < 0.1 % < 0.1 % < 0.1 % gauge factor 2.00 ~ 2.20 2.00 ~ 2.16

2.00 ~ 2.26

gauge factor dispersion < 1 % < 1 % < 1 % strain limit 2.5 % 3 % 2 % fatigue life > 10 7 > 10 7 > 10 7 temperature compensation available for titanium (9), mild steel (11), stainless steel (16),

aluminium (23), magnesium (27), plexiglass (65)

not available

working temp. range - 50 ~ + 80 C - 160 ~ + 150 C - 30 ~ + 80 C

curing temperatures 135 C, 180 C (curing process); 165 C, 180 C (post curing process) bonding adhesives B-610, B-602, B-502 B-610 B-610, B-714, B-502 soldering pad finishing FR (single element gauges), RL (multi-element gauges) RL (all type gauges) lead type (FR or RL) silver-plated solid-copper flat ribban (FR: 0.05 x 0.3 x 30 mm) or round lead (RL: 0.15 x 30 mm)

Metallic Foil Strain Gauges 2. Specifications class-D strain gauges

The class-D gauges are designed for stress analysis to be performed in some critical measuring conditions.

Strain Gauges for Stress Analysis in Critical Conditions OKG series ECU series ECH series OCA, OKA series OCI series gauge features heat resistance and

high insulation resistance

water-proof, corrosion and mildew resistance

residual stress crack propagation high elongation

applications stress analysis and

strain measurements up to 250 C, application of

transducers used in high temperatures up

to 250 C

static presure measurement under water within 50 bar,

stress analysis of the internal wall of

pressure chambers or pressure pipes,

strength test of of dam or highway

measurement of uneven plastic

deformation induced due to external force

or temperature

indication of crack propagation,

measurements of the rate and length of the

crack propagation

elastic-strain and plastic-strain

measurements, as well as stress

analysis of many kinds of materials of

high elengation

metal foil karma alloy constantan alloy constantan alloy constantan, or karma constantan alloy backing material glass fibre reinfored polyimide resiin

polyurethane resin phenolic acetal resin modified acetal resin polyimide resin

cover material, or surface protection

polyimide protective coating on gauge surface

polyurethane cover phenolic acetal cover polyimide protective coating on gauge surface

polyimide protective coating on gauge surface

nominal resistance ( ) 120, 350

120, 350 120

not available

120, 350

tolerance of resistance

< 0.15 % < 0.15 % < 0.15 % < 3 %

gauge factor 1.86 ~ 1.98 2.00 ~ 2.16 2.00 ~ 2.16 > 1.8

gauge factor dispersion

< 1 % < 1 % < 1 % < 3 %

strain limit 1.5 % 2 % 2 % 5 %, 10 %, 15 %, 20%

fatigue life > 10 7 > 10 6 > 10 7 not available working temp. - 269 ~ + 250 C - 30 ~ + 60 C - 30 ~ + 80 C - 30 ~ + 150 C - 30 ~ + 150 C curing temperatures

135 C (curing process), 165 C (post curing process)

temperature compensation available for titanium (9), mild steel (11),

stainless steel (16), luminium (23), magnesium (27), plexiglass (65)

not available not available not available

compensation accuracy

1.0 m/m/ C not available not available not available

insulation R ( M )

10,000 50 (under water) 10,000

crack propagation

not available < 0.02 mm not available

breaking hysteresis

not available < 0.5 mm not available

bonding adhesives

B-601 B-709 B-601, B-602, B-502 B714, B-610, B502 B-713, B-612, B-502

soldering pad finishing

RL RL (1000 mm long), or CW

FR, or RL SP, SD (for OKA-series), RL, or FR

SP

lead type (RL, FR or CW)

silver-plated solid-copper flat ribban (FR: 0.05 x 0.3 x 30 mm) or round lead (RL: 0.15 x 30 mm), or enemel-insulated copper wire (CW: 0.25 x 1000 mm)

The specifications of all the listed gauges are subject to change without notice.


Class-C Strain Gauges for Stress Analysis Class-C strain gauges are temperature-compensated gauges and suitable for general purpose of stress analysis and precision strain measurements where the temperature compensation has to be taking into account. For more information on temperature compensation (S.T.C.), please refer to the topic of STC.

The gauges are organised in part numbers (P/N). In order to choose a proper gauge according to gauge P/N, it is better first refer to Strain Gauge Coding System for a quick selection of the correct gauge.

Following table is a list of all class-C gauges available for delivery.

Gauge Pattern Gauge Part Number (P/N) Grid Dimension (L x W) in mm Backing Dimension

(L x W) in mm

55

ECH-60-02AA-(**)

ECI-60-02AA-(**)

ECH-120-02AA-(**)

ECI-120-02AA-(**)

ECH-120-1AA-(**)

ECI-120-1AA-(**)

0.2 x 1.2

0.2 x 1.2

0.2 x 2.0

0.2 x 2.0

1.0 x 2.0

1.0 x 2.0

3.6 x 3.0

3.6 x 3.0

4.0 x 3.6

4.0 x 3.6

4.3 x 3.5

4.3 x 3.5

56

ECH-60-03AA-(**)

ECH-60-05AA-(**)

ECH-120-03AA-(**)

ECH-120-05AA-(**)

ECH-120-2AA-(**)

ECI-120-2AA-(**)

OCP-120-2AA-(**)

0.3 x 1.0

0.5 x 0.5

0.3 x 1.6

0.52 x1.2

2.0 x 1.7

2.0 x 1.7

2.0 x 1.7

3.6 x 3.0

3.6 x 3.0

3.0 x 3.0

3.0 x 3.0

5.4 x 3.2

5.4 x 3.2

5.4 x 3.2

57

ECH-120-2AA-(**)

ECI-120-2AA-(**)

ECH-120-3AA-(**)

ECI-120-3AA-(**)

OCP-120-3AA-(**)

1.9 x 2.2

1.9 x 2.2

2.8 x 2.0

2.8 x 2.0

2.8 x 2.0

6.2 x 3.4

6.2 x 3.4

6.4 x 3.5

6.4 x 3.5

6.4 x 3.5

58

ECH-120-4AA-(**)

ECI-120-4AA-(**)

OCP-120-4AA-(**)

ECH-120-5AA-(**)

ECI-120-5AA-(**)

OCP-120-5AA-(**)

4.2 x 1.9

4.2 x 1.9

4.2 x 1.9

5.0 x 2.0

5.0 x 2.0

5.0 x 2.0

8.2 x 3.6

8.2 x 3.6

8.2 x 3.6

10.0 x 4.0

10.0 x 4.0

10.0 x 4.0

59

ECH-120-6AA-(**)

ECI-120-6AA-(**)

OCP-120-6AA-(**)

ECH-120-8AA-(**)

ECI-120-8AA-(**)

OCP-120-8AA-(**)

ECH-120-10AA-(**)

ECI-120-10AA-(**)

OCP-120-10AA-(**)

5.8 x 2.7

5.8 x 2.7

5.8 x 2.7

7.8 x 2.6

7.8 x 2.6

7.8 x 2.6

9.8 x 3.0

9.8 x 3.0

9.8 x 3.0

9.7 x 4.2

9.7 x 4.2

9.7 x 4.2

12.2 x 4.3

12.2 x 4.3

12.2 x 4.3

15.5 x 5.0

15.5 x 5.0

15.5 x 5.0

60

OCP-120-20AA-(**)

OCP-120-40AA-(**)

OCP-120-60AA-(**)

OCP-120-80AA-(**)

OCP-120-100AA-(**)

20.0 x 3.0

42.0 x 2.4

60.0 x 2.2

80.0 x 2.5

100.0 x 2.7

27.9 x 7.3

50.0 x 7.0

70.0 x 7.0

90.0 x 7.0

110.0 x 7.0

61

ECH-200-4AA-(**)

ECI-200-4AA-(**)

ECH-200-6AA-(**)

ECI-200-6AA-(**)

ECH-200-8AA-(**)

ECI-200-8AA-(**)

ECH-350-2AA-(**)

ECI-350-2AA-(**)

ECH-350-2AA-A-(**)

ECH-350-3AA-(**)

ECI-350-3AA-(**)

ECH-350-4AA-(**)

ECI-350-4AA-(**)

ECH-350-5AA-(**)

ECI-350-5AA-(**)

ECH-350-6AA-(**)

ECI-350-6AA-(**)

ECH-350-8AA-(**)

ECH-350-10AA-(**)

ECH-500-4AA-(**)

4.0 x 2.0

4.0 x 2.0

6.0 x 2.3

6.0 x 2.3

7.8 x 3.0

7.8 x 3.0

2.4 x 3.2

2.4 x 3.2

2.2 x 3.0

3.1 x 3.0

3.1 x 3.0

4.0 x 2.4

4.0 x 2.4

4.8 x 3.1

4.8 x 3.1

6.4 x 3.4

6.4 x 3.4

7.5 x 5.4

10.0 x 4.8

4.0 x 3.3

9.0 x 4.0

9.0 x 4.0

10.7 x 4.0

10.7 x 4.0

11.0 x 6.0

11.0 x 6.0

6.4 x 4.6

6.4 x 4.6

4.5 x 4.0

7.4 x 4.4

7.4 x 4.4

8.2 x 4.2

8.2 x 4.2

9.3 x 4.6

9.3 x 4.6

10.4 x 5.4

10.4 x 5.4

11.2 x 7

13.8 x 6.6

8.2 x 5.1

61

ECH-500-6AA-(**)

ECH-650-4AA-(**)

ECI-650-4AA-(**)

ECH-650-5AA-(**)

ECH-650-6AA-(**)

ECH-1000-3AA-(**)

ECH-1000-6AA-(**)

6.0 x 3.3

4.2 x 4.2

4.2 x 4.2

5.0 x 3.5

6.2 x 4.5

3.2 x 4.8

6.0 x 5.0

13.2 x 5.8

8.6 x 6.0

8.6 x 6.0

9.0 x 5.6

10.4 x 6.4

7.4 x 7.4

10.0 x 6.3

62

ECH-350-3AB-(**)

ECI-350-3AB-(**)

ECH-350-4AB-(**)

ECI-350-4AB-(**)

ECH-350-6AB-(**)

ECI-350-6AB-(**)

ECH-350-8AB-(**)

ECI-350-8AB-(**)

4.5 x 3.7

4.5 x 3.7

5.5 x 4.8

5.5 x 4.8

8.5 x 6.8

8.5 x 6.8

11.2 x 8.8

11.2 x 8.8

8.2 x 5.9

8.2 x 5.9

10.0 x 7.0

10.0 x 7.0

12.1 x 10.0

12.1 x 10.0

15.0 x 11.0

15.0 x 11.0

63

ECH-350-3AC-(**)

ECI-350-3AC-(**)

ECH-350-4AC-(**)

ECI-350-4AC-(**)

ECH-350-6AC-(**)

ECI-350-6AC-(**)

ECH-350-8AC-(**)

ECI-350-8AC-(**)

4.5 x 3.7

4.5 x 3.7

5.5 x 4.8

5.5 x 4.8

8.5 x 6.8

8.5 x 6.8

11.2 x 8.8

11.2 x 8.8

8.2 x 5.9

8.2 x 5.9

10.0 x 7.0

10.0 x 7.0

12.1 x 10.0

12.1 x 10.0

15.0 x 11.0

15.0 x 11.0

64

ECH-120-2FB-(**)

ECI-120-2FB-(**)

OCP-120-2FB-(**)

ECH-120-3FB-(**)

ECI-120-3FB-(**)

OCP-120-3FB-(**)

ECH-120-4FB-(**)

ECI-120-4FB-(**)

OCP-120-4FB-(**)

ECH-350-3FB-(**)

ECI-350-3FB-(**)

ECH-350-4FB-(**)

ECI-350-4FB-(**)

ECH-350-6FB-(**)

ECI-350-6FB-(**)

2.0 x 2.0

2.0 x 2.0

2.0 x 2.0

3.0 x 3.0

3.0 x 3.0

3.0 x 3.0

4.0 x 2.2

4.0 x 2.2

4.0 x 2.2

3.1 x 3.0

3.1 x 3.0

4.0 x 2.4

4.0 x 2.4

6.4 x 3.4

6.4 x 3.4

4.3 x 5.8

4.3 x 5.8

4.3 x 5.8

7.4 x 7.6

7.4 x 7.6

7.4 x 7.6

8.2 x 6.4

8.2 x 6.4

8.2 x 6.4

7.4 x 7.6

7.4 x 7.6

8.2 x 6.8

8.2 x 6.8

11.0 x 9.0

11.0 x 9.0

65

OCH-120-2HA-D-(**)

OCI-120-2HA-D-(**)

OCH-350-2HA-D-(**)

OCI-350-2HA-D-(**)

OCH-350-3HA-D-(**)

OCI-350-3HA-D-(**)

OCH-350-4HA-D-(**)

OCI-350-4HA-D-(**)

OCH-350-6HA-D-(**)

2.0 x 3.0

2.0 x 3.0

2.0 x 4.2

2.0 x 4.2

3.1 x 3.8

3.1 x 3.8

4.0 x 3.3

4.0 x 3.3

6.0 x 9.7

7.4 x 7.1

7.4 x 7.1

8.8 x 5.6

8.8 x 5.6

8.8 x 6.8

8.8 x 6.8

8.2 x 8.2

8.2 x 8.2

11.0 x 11.3

66

OCH-120-2HA-E-(**)

OCI-120-2HA-E-(**)

OCH-350-2HA-E-(**)

OCI-350-2HA-E-(**)

OCH-350-3HA-E-(**)

OCI-350-3HA-E-(**)

OCH-350-4HA-E-(**)

OCI-350-4HA-E-(**)

2.0 x 3.0

2.0 x 3.0

2.0 x 4.2

2.0 x 4.2

3.1 x 3.8

3.1 x 3.8

4.0 x 3.3

4.0 x 3.3

7.4 x 7.1

7.4 x 7.1

8.8 x 5.6

8.8 x 5.6

8.8 x 6.8

8.8 x 6.8

8.2 x 8.2

8.2 x 8.2

67

ECH-120-2BB-(**)

ECI-120-2BB-(**)

ECH-120-3BB-(**)

ECI-120-3BB-(**)

ECH-120-4BB-(**)

ECI-120-4BB-(**)

ECH-350-2BB-(**)

ECI-350-2BB-(**)

ECH-350-3BB-(**)

ECI-350-3BB-(**)

ECH-350-4BB-(**)

ECI-350-4BB-(**)

ECH-350-6BB-(**)

2.0 x 2.4

2.0 x 2.4

3.0 x 2.8

3.0 x 2.8

4.0 x 4.0

4.0 x 4.0

2.2 x 2.8

2.2 x 2.8

3.0 x 3.4

3.0 x 3.4

4.0 x 4.3

4.0 x 4.3

5.8 x 6.5

8.0 x 6.0

8.0 x 6.0

8.8 x 6.6

8.8 x 6.6

10.0 x 7.6

10.0 x 7.6

8.0 x 6.0

8.0 x 6.0

8.8 x 6.8

8.8 x 6.8

10.0 x 7.8

10.0 x 7.8

14.4 x 10.0

68

ECH-120-2BB-A-(**)

ECI-120-2BB-A-(**)

ECH-120-3BB-A-(**)

ECI-120-3BB-A-(**)

ECH-120-4BB-A-(**)

ECI-120-4BB-A-(**)

ECH-350-2BB-A-(**)

ECI-350-2BB-A-(**)

ECH-350-3BB-A-(**)

ECI-350-3BB-A-(**)

ECH-350-4BB-A-(**)

ECI-350-4BB-A-(**)

ECH-350-6BB-A-(**)

2.0 x 2.4

2.0 x 2.4

3.0 x 2.8

3.0 x 2.8

4.0 x 4.0

4.0 x 4.0

2.2 x 3.3

2.2 x 3.3

3.0 x 3.1

3.0 x 3.1

4.0 x 4.2

4.0 x 4.2

6.0 x 6.1

8.0 x 6.0

8.0 x 6.0

8.8 x 6.6

8.8 x 6.6

10.0 x 7.6

10.0 x 7.6

7.7 x 6.0

7.7 x 6.0

8.4 x 6.8

8.4 x 6.8

10.0 x 7.8

10.0 x 7.8

14.0 x 10.0

69

OCH-120-2BA-(**)

OCI-120-2BA-(**)

OCP-120-2BA-(**)

OCH-120-3BA-(**)

OCI-120-3BA-(**)

OCP-120-3BA-(**)

OCH-120-4BA-(**)

OCI-120-4BA-(**)

OCP-120-4BA-(**)

OCH-120-6BA-(**)

OCP-120-6BA-(**)

2.0 x 1.5

2.0 x 1.5

2.0 x 1.5

3.1 x 1.8

3.1 x 1.8

3.1 x 1.8

3.6 x 1.8

3.6 x 1.8

3.6 x 1.8

5.9 x 3.1

5.9 x 3.1

9.3 x 9.3

9.3 x 9.3

9.3 x 9.3

11.1 x 11.1

11.1 x 11.1

11.1 x 11.1

11.7 x 11.7

11.7 x 11.7

11.7 x 11.7

15.4 x 15.4

15.4 x 15.4

70

OCH-120-2CA-(**)

OCI-120-2CA-(**)

OCP-120-2CA-(**)

OCH-120-3CA-(**)

OCI-120-3CA-(**)

OCP-120-3CA-(**)

OCH-120-4CA-(**)

OCI-120-4CA-(**)

OCP-120-4CA-(**)

OCH-120-6CA-(**)

OCP-120-6CA-(**)

2.0 x 1.5

2.0 x 1.5

2.0 x 1.5

3.1 x 1.8

3.1 x 1.8

3.1 x 1.8

3.6 x 1.8

3.6 x 1.8

3.6 x 1.8

5.9 x 3.1

5.9 x 3.1

9.3 x 9.3

9.3 x 9.3

9.3 x 9.3

11.1 x 11.1

11.1 x 11.1

11.1 x 11.1

11.7 x 11.7

11.7 x 11.7

11.7 x 11.7

15.4 x 15.4

15.4 x 15.4

71

OCH-120-2BC-(**)

OCH-120-3BC-(**)

OCP-120-3BC-(**)

OCH-120-4BC-(**)

OCP-120-4BC-(**)

OCH-120-6BC-(**)

OCP-120-6BC-(**)

2.0 x 2.0

2.8 x 1.7

2.8 x 1.7

4.2 x 1.7

4.2 x 1.7

6.0 x 2.7

6.0 x 2.7

6.6 x 6.6

7.7 x 7.7

7.7 x 7.7

9.4 x 9.4

9.4 x 9.4

12.0 x 12.0

12.0 x 12.0

72

OCH-120-2CB-(**)

OCH-120-3CB-(**)

OCP-120-3CB-(**)

OCH-120-4CB-(**)

OCP-120-4CB-(**)

OCH-120-6CB-(**)

2.0 x 2.0

2.8 x 1.7

2.8 x 1.7

4.2 x 1.7

4.2 x 1.7

6.0 x 2.7

6.6 x 6.6

7.7 x 7.7

7.7 x 7.7

9.4 x 9.4

9.4 x 9.4

12.0 x 12.0

73

ECH-350-2GB-(**)

ECH-350-3GB-(**)

ECH-350-4GB-(**)

2.2 x 3.0

3.1 x 3.0

4.0 x 3.4

10.8 x 4.4

12.6 x 4.4

15.2 x 5.8

74

ECH-350-2GB-AL-(**) 2.2 x 3.0 10.8 x 4.4

75

OCH-120-2CE-(**)

OCH-120-3CE-(**)

2.0 x 2.4

3.0 x 3.4

8.0 x 8.0

11.0 x 11.0

76

ECH-120-4FD-(**)

ECI-120-4FD-(**)

4.0 x 1.8

4.0 x 1.8

8.0 x 11.0

8.0 x 11.0

77

ECH-120-2GD-(**)

ECI-120-2GD-(**)

ECH-350-2GD-(**)

2.0 x 2.2

2.0 x 2.2

2.0 x 3.8

15.3 x 6.2

15.3 x 6.2

20.0 x 5.0

78

OCH-120-1CC-(**)

OCH-120-2CC-(**)

1.0 x 1.0

2.0 x 1.4

6.7 x 6.7

7.0 x 7.0

79

OCH-120-(10)KA-(**)

OCI-120-(15)KA-(**)

OCH-350-(10)KA-(**)

OCI-350-(10)KA-(**)

OCH-350-(15)KA-(**)

OCI-350-(15)KA-(**)

OCH-350-(20)KA-(**)

OCI-350-(20)KA-(**)

9.0

14.0

9.0

9.0

14.0

14.0

19.0

19.0

10.0

15.0

10.0

10.0

15.0

15.0

20.0

20.0

The dimensions of gauge grid and gauge backing are subject to change without notice


Class-D Strain Gauges for Stress Analysis Class-D gauges are specially designed for application of stress analysis to be performed in some critic measurement conditions, like high temperatures (up to 250 C), water proof, or high elongation.

As long as temperature induced error is not so important that it is not necessary to take into account temperature compensation, the class-D strain gauges are recommended in above-mentioned critic measurement conditions.

The class-D gauges are organised in gauge part numbers (P/N). In order to choose a proper gauge according to gauge P/N, we suggest you first refer to Strain Gauge Coding System for a quick selection of the correct gauge.

Following tables list all class-D gauges available for delivery.

1. OKG series strain gauges for higher temperature measurements up to 250 C, temperature compensation available

Gauge Pattern Gauge Part Number (P/N) Grid Dimensions (L x W) in mm Backing Dimensions

(L x W) in mm

85

OKG-120-4AA-(**)

OKG-350-5AA-(**)

3.9 x 2.6

5.0 x 4.1

8.0 x 4.4

9.4 x 5.7

86

OKG-350-3BB-(**)

OKG-350-4BB-(**)

3.0 x 3.4

4.0 x 4.3

8.8 x 6.8

10.0 x 7.8

87

OKG-350-4HA-D-(**) 4.0 x 3.3 8.2 x 8.2

88

OKG-350-4HA-E-(**) 4.0 x 3.3 8.2 x 8.2

89

OKG-120-3BA-(**) 3.0 x 2.5 10.8 x 10.8

90

OKG-120-3CA-(**) 3.0 x 2.5 10.8 x 10.8

91

OKG-350-(10)KA-(**)

OKG-350-(15)KA-(**)

OKG-350-(20)KA-(**)

9.0

14.0

19.0

10.0

15.0

20.0

2. OCH series strain gauges for residual stress measurement


(L x W) in mm

92

OCH-120-2CA-K 2.0 x 1.5 9.3 x 9.3

93

OCH-120-2CD-K

OCH-120-3CD-K

2.0 x 1.5

3.1 x 1.8

dia = 14.0

dia = 16.0

3. OCA and OKA series strain gauges for crack propagation measurement


(L x W) in mm

94

OCA-3-(10)MA

OKA-3-(10)MA

OCA-5-(10)MA

OKA-5-(10)MA

OCA-8-(10)MA

OKA-8-(10)MA

31.0 x 10.0

31.0 x 10.0

35.0 x 10.0

35.0 x 10.0

30.0 x 10.0

30.0 x 10.0

38.0 x 12.0

38.0 x 12.0

37.0 x 12.0

37.0 x 12.0

35.0 x 12.0

35.0 x 12.0

95

OCA-3-(10)MB

OKA-3-(10)MB

OCA-5-(10)MB

OKA-5-(10)MB

OCA-8-(10)MB

OKA-8-(10)MB

23.0 x 9.0

23.0 x 9.0

18.0 x 9.5

18.0 x 9.5

30.0 x 10.0

30.0 x 10.0

30.0 x 11.0

30.0 x 11.0

31.0 x 11.0

31.0 x 11.0

35.0 x 12.0

35.0 x 12.0

96

OCA-8-2(10)MB

OKA-8-2(10)MB 28.0 x 10.0 35.0 x 12.0

97

OCA-3-(6)MC

OKA-3-(6)MC

OCA-4-(12)MC

OKA-4-(12)MC

OCA-5-(18)MC

OKA-5-(18)MC

8.0 x 8.0

8.0 x 8.0

15.0 x 14.0

15.0 x 14.0

27.0 x 26.0

27.0 x 26.0

10.0 x 10.0

10.0 x 10.0

18.0 x 16.0

18.0 x 16.0

35.0 x 32.0

35.0 x 32.0

4. OCI series strain gauges for high elongation measurement (strain limit available: 5%, 10%, 15%, and 20%)


(L x W) in mm

98

OCI-120-6AA-(%)

OCI-120-60AA-(%)

OCI-350-5AA-(%)

6.0 x 3.2

60.0 x 3.2

5.0 x 4.9

12.0 x 8.0

68.0 x 6.0

10.3 x 7.8

99

OCI-120-5AA-(%)-C

OCI-350-5AA-(%)-C

6.3 x 3.7

5.0 x 4.9

15.0 x 7.0

12.9 x 7.8

99'

TCI-DCA3 G1 *

TCI-DCA6 G1 *

* : terminals used with No. 99 gauge

3.4 x 2.0

6.4 x 2.6

5.0 x 5.0

8.0 x 8.0

5. ECU series water-proof strain gauges for stress measurement under water


(L x W) in mm

100

ECU-120-4AA-(**)

ECU-350-4AA-(**)

4.0 x 2.3

4.0 x 2.8

30.0 x 10.0

29.0 x 12.0

The dimensions of gauge grid and gauge backing are subject to change without notice.

Documents

Strain Gauge for stress analysis